UI: Make projectors somewhat work on Wayland

[cg2121]

Description

This makes the projectors work on Wayland. The ability to set a fullscreen projector windowed and vice-versa is disabled, as Wayland doesn't really support resizing windows from code.

Motivation and Context

Original PR by @kkartaltepe #6357

How Has This Been Tested?

Make projectors usable on Wayland

Types of changes

• Bug fix (non-breaking change which fixes an issue)

Checklist:

• My code has been run through clang-format.
• I have read the contributing document.
• My code is not on the master branch.
• The code has been tested.
• All commit messages are properly formatted and commits squashed where appropriate.
• I have included updates to all appropriate documentation.

[kkartaltepe]

If we are going to disable fullscreen on wayland I have a newer better version of this somewhere.

[cg2121]

To be clear, this just disables the right click menu options, in the projector window, of changing to fullscreen or windowed.

[kkartaltepe]

Right, I wasnt clear but that is what i meant.

[OchiLive]

This also appears to fix the "explicit sync" crash for me, even without the change from #11556.

I'd like to point out though that the "Fullscreen" and "Windowed" context menu entries seemed to work fine for me with kwin and labwc, so maybe that's specific to certain Wayland compositors. Out of curiosity, in which compositors do you have issues with those menu options?

I personally don't care much about those menu options though, so if this is a more general fix or workaround for more Wayland compositors, that's great.

[cg2121]

The projector problems, I've been seeing, happen on Gnome with Mutter.

[OchiLive]

@cg2121 Ah okay, that's interesting. I gave Gnome 47 in Wayland mode a quick try on my machine. Without any patches, the stable version of OBS crashes with the same explicit sync error as it does in KDE. With #11556 applied, I think I see what you mean, the projector window is missing its decoration (the context menu entries for fullscreen/windowed appear to work though). With your pull request applied it works better and does show the window decorations. I guess the behavior somewhat depends on the specific Wayland compositor.

[norihiro]

The commit description below exceeds the 72-character limit.

This makes the projectors work on Wayland. The ability to set a fullscreen