Added configuration foldout to all service configuration profiles (#529)

* added configuration foldout

* updated foldout label content to include the interface type this configuration expects

XRTK-Core/Packages/com.xrtk.core/Inspectors/Profiles/MixedRealityServiceProviderProfileInspector.cs

@@ -23,6 +23,8 @@ public class MixedRealityServiceProfileInspector : BaseMixedRealityProfileInspec
 
         private SerializedProperty configurations;
 
+        private bool showConfigurationFoldout = true;
+
         /// <summary>
         /// Gets the service constraint used to filter options listed in the
         /// <see cref="configurations"/> instance type dropdown. Set after
@@ -56,18 +58,21 @@ protected override void OnEnable()
         public override void OnInspectorGUI()
         {
             EditorGUILayout.Space();
-            EditorGUILayout.LabelField("Configuration Options", EditorStyles.boldLabel);
-            EditorGUILayout.Space();
-            serializedObject.Update();
-            EditorGUILayout.Space();
-            configurationList.DoLayoutList();
+            showConfigurationFoldout = EditorGUILayout.Foldout(showConfigurationFoldout, new GUIContent($"{ServiceConstraint.Name} Configuration Options"), true);
 
-            if (configurations == null || configurations.arraySize == 0)
+            if (showConfigurationFoldout)
             {
-                EditorGUILayout.HelpBox("Register a new Service Configuration", MessageType.Warning);
-            }
+                serializedObject.Update();
+                EditorGUILayout.Space();
+                configurationList.DoLayoutList();
 
-            serializedObject.ApplyModifiedProperties();
+                if (configurations == null || configurations.arraySize == 0)
+                {
+                    EditorGUILayout.HelpBox($"Register a new {ServiceConstraint.Name} Configuration", MessageType.Warning);
+                }
+
+                serializedObject.ApplyModifiedProperties();
+            }
         }
 
         private void DrawConfigurationOptionElement(Rect rect, int index, bool isActive, bool isFocused)