Add AddMarginBottomClass to remove the mb class.

[maliming]

Resolve #17948

[myesn]

Please consider default to false, because I don't think a hidden element should have side effects:

public bool AddMarginBottomClass  { get; set; } = false;

[codecov]

Codecov Report

Merging #17960 (5381c9e) into dev (8a26da9) will decrease coverage by 0.03%.
Report is 53 commits behind head on dev.
The diff coverage is n/a.

@@            Coverage Diff             @@
##              dev   #17960      +/-   ##
==========================================
- Coverage   51.66%   51.63%   -0.03%     
==========================================
  Files        3052     3054       +2     
  Lines       95431    95566     +135     
  Branches     7609     7617       +8     
==========================================
+ Hits        49306    49350      +44     
- Misses      44610    44697      +87     
- Partials     1515     1519       +4     

see 8 files with indirect coverage changes

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[maliming]

Please consider default to false, because I don't think a hidden element should have side effects:

public bool AddMarginBottomClass  { get; set; } = false;

We don't want to make a breaking change.