Implement subtitles settings in realtime

[efb4f5ff-1298-471a-8973-3d47447115dc]

Is your feature request related to a usage problem (not a bug)? Please describe.
At the moment u have to open the subtitles settings and apply the settings u like for the subtitles. This causes a few problems:

1. The video pauses.
2. If there are no subtitles shown at the moment the video pauses u dont have example text. So that means u will see what settings u applied to the subtitles after u click "Done".

Describe the solution you'd like to see implemented
It would look much cleaner if we implemented the subtitles like shown on the screenrecording.

Describe alternatives you've considered
None.

Screenrecording

nj3toqH8nX.mp4

Additional context
This would make these issues obsolete #1343, #968