Dark vs light mode automated detection

[maxradx]

Is your feature request related to a problem? Please describe.
If the user uses Slicer in Darkmode, then some policy may be dark and difficult to read (dark on dark)

Describe the solution you'd like
Automated detection and adaptation of the policy colors used in the module according to the 3D Slicer color mode.

Describe alternatives you've considered
Insert if statements in the code (not-optimal!)

Additional context
An illustrated example.

[maxradx]

Useful? https://github.com/sjh26/SlicerThemes

[AcastaPaloma]

Will check out slicerthemes.