test: added matrix 3x3 test

[Mageconvict]

No description provided.

[Mageconvict]

Window header UI text scaling needs to be implemented in: src/main/kotlin/com/almasb/fxgl/ui/MDIWindow.kt

At line: 163.

[codecov-commenter]

Codecov Report

Merging #1258 (2fc1c94) into dev (6702081) will increase coverage by 0.00%.
The diff coverage is 60.00%.

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@@            Coverage Diff            @@
##                dev    #1258   +/-   ##
=========================================
  Coverage     58.74%   58.75%           
  Complexity     2937     2937           
=========================================
  Files           304      304           
  Lines         15046    15050    +4     
  Branches       1540     1540           
=========================================
+ Hits           8839     8842    +3     
- Misses         5700     5701    +1     
  Partials        507      507           

Impacted Files	Coverage Δ
...almasb/fxgl/ui/FXGLDialogFactoryServiceProvider.kt	0.00% <0.00%> (ø)
...gl/src/main/kotlin/com/almasb/fxgl/app/Settings.kt	90.15% <100.00%> (+0.11%)	⬆️

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[AlmasB]

Looks good, thanks!