Use fx:define and load fxml in separate thread where possible for play tab

[Sheikah45]

No description provided.

[codecov]

Codecov Report

Merging #3009 (b195d31) into develop (a8bb3b7) will increase coverage by 0.02%.
The diff coverage is 77.69%.

❗ Current head b195d31 differs from pull request most recent head f5804ad. Consider uploading reports for the commit f5804ad to get more accurate results

Additional details and impacted files

@@              Coverage Diff              @@
##             develop    #3009      +/-   ##
=============================================
+ Coverage      61.35%   61.37%   +0.02%     
- Complexity      4591     4592       +1     
=============================================
  Files            554      553       -1     
  Lines          20131    20118      -13     
  Branches        1045     1040       -5     
=============================================
- Hits           12351    12348       -3     
+ Misses          7195     7191       -4     
+ Partials         585      579       -6     

Impacted Files	Coverage Δ
...om/faforever/client/game/GamesTableController.java	51.28% <0.00%> (-0.42%)	⬇️
...ver/client/game/GamesTilesContainerController.java	59.21% <40.00%> (-2.44%)	⬇️
...om/faforever/client/game/PlayerCardController.java	74.78% <46.15%> (-8.37%)	⬇️
...aforever/client/replay/ReplayDetailController.java	79.13% <75.75%> (-3.00%)	⬇️
...m/faforever/client/game/GameTooltipController.java	87.80% <95.65%> (+7.80%)	⬆️
.../com/faforever/client/game/TeamCardController.java	69.11% <95.65%> (+4.73%)	⬆️
...om/faforever/client/game/GameDetailController.java	91.66% <100.00%> (+1.75%)	⬆️
...ent/teammatchmaking/TeamMatchmakingController.java	91.46% <100.00%> (ø)

... and 3 files with indirect coverage changes

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