Fix 1960

[fwesselm]

• These changes fix Another bug in MIP presolve #1960.
• Implied bounds are now reset when the respective rows / columns of the coefficient matrix used to derive these bounds are modified (e.g. via HPresolve::addToMatrix()).

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.65%. Comparing base (72d6b68) to head (c13d1a0).
Report is 29 commits behind head on latest.

Additional details and impacted files

@@            Coverage Diff             @@
##           latest    #2151      +/-   ##
==========================================
+ Coverage   78.55%   78.65%   +0.09%     
==========================================
  Files         345      345              
  Lines       83059    83072      +13     
==========================================
+ Hits        65245    65338      +93     
+ Misses      17814    17734      -80     

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