FGManager: Apply the RDPDShowRedirectionFilter exception to audio
VSFilter: Apply default style changes on runtime. No need to reload anymore.

Don't set subtitle again when manipulating style.
STS: Cosmetics
Sync code of the subtitle editor between VSFilter and MPC-HC
Fix typo leading to disable frame stepping in DVD mode.

Fixes #4299
Frame stepping optimizations and cosmetics.

- Backward frame stepping should be faster now
- Add ability to seek through DVD in paused state
ISR: Apply aspect ratio compensation.
Cosmetic: Change methods name to indicate that they are subtitles related.
build.bat: Base nightly status on revision number.