Capture frame/snapshot/screenshot and export video frames improvements

[mifi]

Will gather improvement requests to the capture frame and export multiple frames feature.

• [x] choose JPEG quality #1141
• [ ] Choose output bit depth e.g. 24bit images instead of 48bit #1896
• [ ] JPGXL or AVIF format options for video snapshots #1907
• [ ] Keep selected rotation #823
• [ ] Lossy PNG optimization #1365