diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c37340a54..6751ca36a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -34,36 +34,36 @@ jobs:
     steps:
     - uses: actions/checkout@v2
 
-    - name: Install required system packages
+    - name: 📚 Install required system packages
       if: matrix.os == 'ubuntu-latest'
       run: |
         sudo apt update
         sudo apt install xorg-dev libglu1-mesa-dev libgtk-3-dev
 
-    - name: Create build folder
+    - name: 📁 Create build folder
       run: cmake -E make_directory ${{runner.workspace}}/build
 
-    - name: configure with OpenMP
+    - name: ⚙ Configure with OpenMP
       if: matrix.openmp == true
       shell: bash
       working-directory: ${{runner.workspace}}/build
       run: cmake $GITHUB_WORKSPACE -DCMAKE_BUILD_TYPE=$BUILD_TYPE $CMAKE_FLAGS -DSPIRIT_USE_OPENMP=ON
 
-    - name: configure
+    - name: ⚙ Configure
       if: matrix.openmp == false
       shell: bash
       working-directory: ${{runner.workspace}}/build
       run: cmake $GITHUB_WORKSPACE -DCMAKE_BUILD_TYPE=$BUILD_TYPE $CMAKE_FLAGS
 
-    - name: build
+    - name: 🛠 Build
       shell: bash
       working-directory: ${{runner.workspace}}/build
       run: cmake --build . --config $BUILD_TYPE -j 2
 
-    - name: Install python packages
+    - name: 📚 Install python packages
       run: pip install --user numpy
 
-    - name: test
+    - name: 🧪 Test
       shell: bash
       working-directory: ${{runner.workspace}}/build
       run: ctest -C $BUILD_TYPE -E $EXCLUDETESTS --output-on-failure
@@ -80,27 +80,27 @@ jobs:
       with:
         python-version: '3.x'
 
-    - name: Create build folder
+    - name: 📁 Create build folder
       run: cmake -E make_directory ${{runner.workspace}}/build
 
-    - name: configure
+    - name: ⚙ Configure
       shell: bash
       working-directory: ${{runner.workspace}}/build
       run: cmake $GITHUB_WORKSPACE -DCMAKE_BUILD_TYPE=$BUILD_TYPE $CMAKE_FLAGS
 
-    - name: build
+    - name: 🛠 Build
       shell: bash
       working-directory: ${{runner.workspace}}/build
       run: cmake --build . --config Release -j 2
 
-    - name: Install necessary packages
+    - name: 📚 Install necessary packages
       run: |
         python -m pip install --upgrade pip
         python -m pip install numpy coverage 'coveralls<3' wheel
         sudo apt update
         sudo apt install lcov
 
-    - name: generate C++ coverage
+    - name: 🧪 Generate C++ coverage
       shell: bash
       working-directory: ${{runner.workspace}}/build
       run: |
@@ -109,12 +109,12 @@ jobs:
         lcov -c --no-external --directory . --base-directory $GITHUB_WORKSPACE/core -o after_test.info
         lcov -a baseline.info -a after_test.info -o total_test.info
         lcov -r total_test.info \*thirdparty\* \*/test/\* \*Collection\* \*DLL_\* -o coverage.info
-    - name: upload C++ coverage
+    - name: ⬆ Upload C++ coverage
       uses: codecov/codecov-action@v1
       with:
         files: ${{runner.workspace}}/build/coverage.info
 
-    - name: Python API coverage
+    - name: 🧪 Python API coverage
       working-directory: ./core/python
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
@@ -134,23 +134,23 @@ jobs:
     steps:
     - uses: actions/checkout@v2
 
-    - name: Create build folder
+    - name: 📁 Create build folder
       run: cmake -E make_directory ${{runner.workspace}}/build
 
-    - name: configure
+    - name: ⚙ Configure
       shell: bash
       working-directory: ${{runner.workspace}}/build
       run: cmake $GITHUB_WORKSPACE -DCMAKE_BUILD_TYPE=$BUILD_TYPE $CMAKE_FLAGS
 
-    - name: build
+    - name: 🛠 Build
       shell: bash
       working-directory: ${{runner.workspace}}/build
       run: cmake --build . --config $BUILD_TYPE -j 2
 
-    - name: Install python packages
+    - name: 📚 Install python packages
       run: pip install --user numpy
 
-    - name: test
+    - name: 🧪 Test
       shell: bash
       working-directory: ${{runner.workspace}}/build
       run: ctest -C $BUILD_TYPE --output-on-failure
@@ -170,20 +170,20 @@ jobs:
     steps:
     - uses: actions/checkout@v2
 
-    - name: Install CUDA
+    - name: 📚 Install CUDA
       run: |
         sudo apt update
         sudo apt install nvidia-cuda-toolkit
 
-    - name: Create build folder
+    - name: 📁 Create build folder
       run: cmake -E make_directory ${{runner.workspace}}/build
 
-    - name: configure
+    - name: ⚙ Configure
       shell: bash
       working-directory: ${{runner.workspace}}/build
       run: cmake $GITHUB_WORKSPACE -DCMAKE_BUILD_TYPE=$BUILD_TYPE $CMAKE_FLAGS
 
-    - name: build
+    - name: 🛠 Build
       shell: bash
       working-directory: ${{runner.workspace}}/build
       run: cmake --build . --config $BUILD_TYPE -j 2
@@ -197,20 +197,20 @@ jobs:
     steps:
     - uses: actions/checkout@v2
 
-    - name: Install Qt5
+    - name: 📚 Install Qt5
       run: |
         sudo apt update
         sudo apt install qt5-default libqt5charts5-dev
 
-    - name: Create build folder
+    - name: 📁 Create build folder
       run: cmake -E make_directory ${{runner.workspace}}/build
 
-    - name: configure
+    - name: ⚙ Configure
       shell: bash
       working-directory: ${{runner.workspace}}/build
       run: cmake $GITHUB_WORKSPACE -DCMAKE_BUILD_TYPE=$BUILD_TYPE $CMAKE_FLAGS
 
-    - name: build
+    - name: 🛠 Build
       shell: bash
       working-directory: ${{runner.workspace}}/build
       run: cmake --build . --config $BUILD_TYPE -j 2
@@ -219,13 +219,13 @@ jobs:
     runs-on: ubuntu-20.04
     env:
       BUILD_TYPE: Release
-      CMAKE_FLAGS: -DSPIRIT_BUILD_FOR_JS=ON
+      CMAKE_FLAGS: -DSPIRIT_UI_USE_IMGUI=ON -DSPIRIT_BUILD_FOR_JS=ON
       EMSCRIPTEN_VERSION: "1.39.20"
 
     steps:
     - uses: actions/checkout@v2
 
-    - name: Install Emscripten
+    - name: 📚 Install Emscripten
       working-directory: ${{runner.workspace}}
       run: |
         git clone https://github.com/emscripten-core/emsdk.git
@@ -233,17 +233,17 @@ jobs:
         ./emsdk install $EMSCRIPTEN_VERSION
         ./emsdk activate $EMSCRIPTEN_VERSION
 
-    - name: Create build folder
+    - name: 📁 Create build folder
       run: cmake -E make_directory ${{runner.workspace}}/build
 
-    - name: configure
+    - name: ⚙ Configure
       shell: bash
       working-directory: ${{runner.workspace}}/build
       run: |
         source ${{runner.workspace}}/emsdk/emsdk_env.sh
         cmake $GITHUB_WORKSPACE -DCMAKE_BUILD_TYPE=$BUILD_TYPE $CMAKE_FLAGS -DCMAKE_TOOLCHAIN_FILE=${{runner.workspace}}/emsdk/upstream/emscripten/cmake/Modules/Platform/Emscripten.cmake
 
-    - name: build
+    - name: 🛠 Build
       shell: bash
       working-directory: ${{runner.workspace}}/build
       run: |
@@ -269,30 +269,30 @@ jobs:
       with:
         python-version: '3.x'
 
-    - name: Configure environment
+    - name: ⚙ Configure environment
       shell: bash
       if: github.ref == 'refs/heads/master'
       run: echo "SPIRIT_ADD_VERSION_SUFFIX=false" >> $GITHUB_ENV
 
-    - name: Create build folder
+    - name: 📁 Create build folder
       run: cmake -E make_directory ${{runner.workspace}}/build
 
-    - name: configure
+    - name: ⚙ Configure
       shell: bash
       working-directory: ${{runner.workspace}}/build
       run: cmake $GITHUB_WORKSPACE -DCMAKE_BUILD_TYPE=$BUILD_TYPE $CMAKE_FLAGS
 
-    - name: build
+    - name: 🛠 Build
       shell: bash
       working-directory: ${{runner.workspace}}/build
       run: cmake --build . --config $BUILD_TYPE -j 2
 
-    - name: Install necessary packages
+    - name: 📚 Install necessary packages
       run: |
         python -m pip install --upgrade pip
         python -m pip install numpy setuptools wheel twine
 
-    - name: build Python package
+    - name: 🛠 Build Python package
       shell: bash
       working-directory: ./core/python
       run: |
@@ -300,7 +300,7 @@ jobs:
         echo "Add suffix to spirit version tag for python package $SPIRIT_ADD_VERSION_SUFFIX"
         python setup.py sdist bdist_wheel
 
-    - name: Deploy to TestPyPI
+    - name: 🚀 Deploy to TestPyPI
       working-directory: ./core/python
       env:
         TWINE_USERNAME: ${{ secrets.PYPI_USERNAME }}
@@ -308,7 +308,7 @@ jobs:
       if: github.ref != 'refs/heads/master'
       run: twine upload --skip-existing --repository testpypi dist/*
 
-    - name: Deploy to PyPI
+    - name: 🚀 Deploy to PyPI
       working-directory: ./core/python
       env:
         TWINE_USERNAME: ${{ secrets.PYPI_USERNAME }}
@@ -331,21 +331,21 @@ jobs:
     steps:
     - uses: actions/checkout@v2
 
-    - name: Install required system packages
+    - name: 📚 Install required system packages
       if: matrix.os == 'ubuntu-latest'
       run: |
         sudo apt update
         sudo apt install xorg-dev libglu1-mesa-dev libgtk-3-dev
 
-    - name: Create build folder
+    - name: 📁 Create build folder
       run: cmake -E make_directory ${{runner.workspace}}/build
 
-    - name: configure
+    - name: ⚙ Configure
       shell: bash
       working-directory: ${{runner.workspace}}/build
       run: cmake $GITHUB_WORKSPACE -DCMAKE_BUILD_TYPE=$BUILD_TYPE $CMAKE_FLAGS
 
-    - name: build
+    - name: 🛠 Build
       shell: bash
       working-directory: ${{runner.workspace}}/build
       run: |
@@ -353,7 +353,7 @@ jobs:
         cmake --install .
         cmake --build . --config $BUILD_TYPE -j 2 --target package
 
-    - name: archive ubuntu package
+    - name: 📦 Archive ubuntu package
       if: matrix.os == 'ubuntu-latest'
       uses: actions/upload-artifact@v2
       with:
@@ -361,7 +361,7 @@ jobs:
         path: |
           ${{runner.workspace}}/build/*.tar.gz
 
-    - name: archive macos package
+    - name: 📦 Archive macos package
       if: matrix.os == 'macos-latest'
       uses: actions/upload-artifact@v2
       with:
@@ -373,7 +373,7 @@ jobs:
           ${{runner.workspace}}/build/install/VERSION.txt
           ${{runner.workspace}}/build/install/licenses/
 
-    - name: archive windows package
+    - name: 📦 Archive windows package
       if: matrix.os == 'windows-latest'
       uses: actions/upload-artifact@v2
       with: