Support all of the different scene transitions

[jbwong05]

Is your feature request related to a problem? Please describe. Only a subset of the scene transitions are available to be used for the slideshow

Describe the solution you'd like Add support for all of the available OBS scene transitions as requested by PNO on the OBS forum here

Additional context Need to look into the missing scene transitions and the possibility of being able to invoke the custom creation transition windows

[cheeeeeeeeeen]

I would very much love this feature. Keep up the good work, by the way.