2469: Fixing Award Log Edit NPEs

[Windchild292]

This fixes #2469. As part of that fix, I've also moved the dialog to extend AbstractMHQButtonDialog.

[codecov]

Codecov Report

Merging #2471 (23df0b8) into master (7156e17) will increase coverage by 0.02%.
The diff coverage is 0.00%.

@@             Coverage Diff              @@
##             master    #2471      +/-   ##
============================================
+ Coverage     10.40%   10.43%   +0.02%     
- Complexity     3439     3444       +5     
============================================
  Files           669      669              
  Lines         94279    94280       +1     
  Branches      15825    15828       +3     
============================================
+ Hits           9810     9835      +25     
+ Misses        83101    83078      -23     
+ Partials       1368     1367       -1     

Impacted Files	Coverage Δ	Complexity Δ
MekHQ/src/mekhq/campaign/log/AwardLogEntry.java	33.33% <0.00%> (-6.67%)	1.00 <0.00> (ø)
MekHQ/src/mekhq/campaign/log/AwardLogger.java	33.33% <0.00%> (-3.51%)	3.00 <0.00> (ø)
.../mekhq/gui/adapter/PersonnelTableMouseAdapter.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
...src/mekhq/gui/control/EditPersonnelLogControl.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
...ekhq/gui/dialog/AddOrEditPersonnelEntryDialog.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
.../mekhq/campaign/universe/FactionBorderTracker.java	68.87% <0.00%> (-2.05%)	35.00% <0.00%> (-1.00%)
...Q/src/mekhq/campaign/universe/RegionPerimeter.java	83.33% <0.00%> (-0.70%)	39.00% <0.00%> (-1.00%)
MekHQ/src/mekhq/campaign/unit/Unit.java	20.28% <0.00%> (-0.04%)	208.00% <0.00%> (ø%)
MekHQ/src/mekhq/campaign/mission/AtBContract.java	19.20% <0.00%> (+0.11%)	65.00% <0.00%> (+1.00%)
...ekHQ/src/mekhq/campaign/market/ContractMarket.java	59.09% <0.00%> (+0.79%)	114.00% <0.00%> (+2.00%)
... and 2 more

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