Fixed the automatic setting of USED when adding new values for rotations

[pariterre]

This change is 

[codecov]

Codecov Report

Merging #246 (7c52c47) into dev (70ea0c9) will decrease coverage by 0.34%.
The diff coverage is 20.68%.

❗ Current head 7c52c47 differs from pull request most recent head 0d7e36e. Consider uploading reports for the commit 0d7e36e to get more accurate results

@@            Coverage Diff             @@
##              dev     #246      +/-   ##
==========================================
- Coverage   97.01%   96.67%   -0.35%     
==========================================
  Files          30       30              
  Lines        5268     5297      +29     
==========================================
+ Hits         5111     5121      +10     
- Misses        157      176      +19     

Impacted Files	Coverage Δ
src/Parameters.cpp	90.02% <11.53%> (-6.10%)	⬇️
src/ezc3d.cpp	96.71% <100.00%> (+0.01%)	⬆️
src/Frame.cpp	94.00% <0.00%> (+4.00%)	⬆️
src/Rotations.cpp	65.11% <0.00%> (+4.65%)	⬆️

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