bicarus cd14ca800e graphics: fix window resize not working properly in some games (#530) ...

## Link to GitHub Issue, if one exists
n/a

## Description of change
Need to filter out system-created windows (such as `CicMarshalWnd`) when
looking up which window to mess with when user interacts with F11 menu.

While I'm here, clean up the hack for gfdm arena model that remembers
the main window.

## Testing
Tested:

DDR
gfdm arena 4 / 1 window modes
iidx (windowed mode, with/without nosub option)
sdvx with sub windows

Need to check:
full screen games

2026-01-22 19:06:31 -08:00

..

spice2x

graphics: fix window resize not working properly in some games (#530)

2026-01-22 19:06:31 -08:00