This change makes it so any strings in a scene collection that start
with "./" are checked as being a relative path. As long as the resulting
absolute path is contained within the same directory as the collection
being imported, it will be replaced with an absolute path.
This allows scene collections to be effectively "packaged" with assets,
so long as the assets are contained somewhere within the folder the
collection is being imported from.
Versioned sources were added in commit
b2302902a3 after the scene collection
importer was added in commit 191165c721.
When a versioned source gets converted in TranslateOSStudio, it can end
up with a translated "id" but an untranslated "versioned_id". When OBS
loads the resulting JSON, it will rely on the versioned_id, and rewrite
the id to the corresponding value. Use obs_get_latest_input_type_id on
the translated source id to get the correct versioned_id when using
TranslateOSStudio.
The OS translation in the Scene Collection Importer seems to have been
broken since the feature was added because the translated sources were
not added back to the output JSON object. Add the translated sources to
the output JSON object to get the feature to work.
This replaces the previous Open File dialog for importing collections
with a window for importing many collections at once, based on the remux
window, along with support for importing from OBS Classic, XSplit
Broadcaster and from Streamlabs' fork. This also translates sources
between OSes that Studio supports.
