Fixes:
- Fix Anti-Aliasing on Nvidia by disabling forced Anti-Aliasing Gamma Correction in the driver
- Fix navigation issues and crashes when a display has 0 filters defined
- Fix the execution order of signal callbacks
- Fix disappearing event sound mappings when Sound Volume is set to 0
- Fix deleting a display. Deleting a display was causing copying properties of just deleted display into a next display and saving it to attract.cfg