Use the same cylinder geometry for all borders/widgets

[MortimerGoro]

Requires: MozillaReality/vrb#73

I want to reuse a single cylinder geometry for all widgets (on non layers devices) and for all resize/hover borders with layer devices. This will avoid some small delays while creating new cylindrical widgets or borders (e.g. resize, hover)

[bluemarvin]

I'm hoping fixing this issue will also fix the jank that happens when creating a new window.

[bluemarvin]

This may not actually be feasible. Additionally, the jank was primarily caused by shader compilation which should be fixed by #2773