Fix for "Regenerate Forces" duplicating scenario description and objectives

[cjdhein]

This is a fix for issue #3600

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: -0.01 ⚠️

Comparison is base (1ff64f2) 10.66% compared to head (d3f3f54) 10.65%.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #3670      +/-   ##
============================================
- Coverage     10.66%   10.65%   -0.01%     
  Complexity     5473     5473              
============================================
  Files           830      830              
  Lines        113499   113502       +3     
  Branches      17155    17156       +1     
============================================
  Hits          12099    12099              
- Misses       100194   100197       +3     
  Partials       1206     1206              

Impacted Files	Coverage Δ
...hq/campaign/mission/AtBDynamicScenarioFactory.java	0.75% <0.00%> (-0.01%)	⬇️
...ign/mission/atb/AtBScenarioModifierApplicator.java	0.00% <0.00%> (ø)

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