Deactivate control points whose contribution is completely overwritten

[SouthEndMusic]

Fixes #75

To do:

• Add docstring for error_informed_local_refinement!
• Add docstrings for new functions

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 95.09202% with 8 lines in your changes missing coverage. Please review.

Project coverage is 92.80%. Comparing base (1cd684b) to head (90a0a24).

Files with missing lines	Patch %	Lines
src/adjoint.jl	90.27%	7 Missing ⚠️
src/validation.jl	91.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #93      +/-   ##
==========================================
+ Coverage   92.69%   92.80%   +0.11%     
==========================================
  Files          14       15       +1     
  Lines        1040     1126      +86     
==========================================
+ Hits          964     1045      +81     
- Misses         76       81       +5     

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