- Do not try initializing shaders if requirements are not met or if window does not exist
- Warn user before closing window. Situation is unexpected, there is chance of more issues, like a freeze or a crash on close()
- mHasMultitexture is a solid requirement, if it is not present, we won't be able to run

also cleaned up some xui warnings

User opened editor, pressed play, according to logs environment wasn't loaded yet, asset had yet to arrive.

token input is now handled and message formatting is improved.
Added beginnings of support for saving slmfa_hash value client side.

We now present MFA errors to the user during login and prompt them for
an authentication token.

Just in case

User opened editor, pressed play, according to logs environment wasn't loaded yet, asset had yet to arrive.

This reverts commit a5675bed.
Commit slipped in by accident

DRTVWR-534: Batch of modifications to 360 capture project after moving from internal repo to public one.