Build proxies automatically when added to sequencer timeline and when
switching preview size.
This behavior can be disabled in user preferences.
Reviewed By: sergey, fsiddi
Differential Revision: https://developer.blender.org/D10363
- Remove Full Render size from VSE preview size. Use just 100% instead.
- Add Use Proxies checkbox to control whether proxies are used globally
- Move preview size to top so it is most prominent
- Set default to 100% preview size and use proxies
Reviewed By: sergey, fsiddi
Differential Revision: https://developer.blender.org/D10362
