Setting Full Screen debug setting on MacOS results in black screen on relaunch

[AtlasLinden]

Environment

Second Life Project Gltf Mesh Import 7.1.14.15976006598

Description

It is pointless to enable Full Screen on macOS as the maximize button already achieves this.
Regardless, enabling this setting and relaunching the viewer gives a black screen with no UI displayed.

Found during testing of #3317.
Previous viewer builds without this recent fullscreen fix also reproduce this issue.

Reproduction steps

1. Open Debug Settings and set Full Screen to TRUE
2. Restart the viewer

[akleshchev]

If it's pointless, should it just be disabled on macOS?

[AtlasLinden]

Unless Apple decides to change how the maximize button works on MacOS or someone can think of another reason why this setting would be necessary, then yes it may as well be disabled.

[akleshchev]

someone can think of another reason why this setting would be necessary

People might want viewer to start maximized, but arguably debug setting is a very poor fit for that. I think Kyle or Geenz need to check it.

[kylelinden]

Ok to disable debug setting on MacOS only. Leave updated comment in the settings info.