SelectAbilitiesDialog: Adding SPA Display Name Sorting

[Windchild292]

It was annoying to try to find the correct SPA when bugtesting #2923, so this adds sorting to it and fixes the tab spacing.

[codecov]

Codecov Report

Merging #2924 (4562992) into master (7947574) will decrease coverage by 0.00%.
The diff coverage is 0.00%.

@@             Coverage Diff              @@
##             master    #2924      +/-   ##
============================================
- Coverage     10.54%   10.54%   -0.01%     
+ Complexity     3867     3866       -1     
============================================
  Files           733      733              
  Lines        101239   101240       +1     
  Branches      16537    16537              
============================================
- Hits          10674    10673       -1     
- Misses        89181    89182       +1     
- Partials       1384     1385       +1     

Impacted Files	Coverage Δ
...HQ/src/mekhq/gui/dialog/SelectAbilitiesDialog.java	0.00% <0.00%> (ø)
MekHQ/src/mekhq/campaign/universe/Faction.java	65.38% <0.00%> (-0.65%)	⬇️

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