Fixes a bug where the individual drop-down lists of each quick
transition would not have the correct available transitions listed if
transitions were added, renamed, or removed
With these new functions, plugin developers can enable, disable and
get the status of Studio Mode, as well as get and set the current
preview scene and transition the current preview to Program
Here is a list of the Studio Mode events:
- Studio Mode enabled
- Studio Mode disabled
- Previewed scene in Studio Mode changed
This allows using the functions via Qt message queue. The reason for
this is so a frontend API can queue these functions to call safely from
another thread.
