(Non-compiling commit: windowless-context branch)
Now that all obs_display related code has been moved to OBSQTDisplay,
we can prune a whole bunch of boilerplate code that had to be repeated
for the displays of each window.
Affects:
- Properties
- Filters
- Interact
- Projector
This prevents the weird stretching effect that occurs whenever a windows
is in the process of being resized by the user.
Originally it was intended as an optimization, but even on half-decent
computers it doesn't really have much benefit.