UI: Rewrite scene collection system to enable user-provided storage

Browse Source

This change enables loading scene collections from locations different
than OBS' own configuration directory.

It also rewrites profile management in the app to work off an in-memory
collection of profiles found on disk and does not require iterating
over directory contents for most profile interactions by the app.

...

This commit is contained in:

500 Internal Server Error

Gitea Version: 1.28.0+dev-477-g8b6ad49a5f