[FEATURE] Secondary viewer panel for shots comparison (useful for color grading)
I think the title is clear enough, but in case if it's too vague: when color grading you usually want to compare the current shot with another one (whether it's the previous, the next or another). Having a a secondary viewer where you can play another clip or at least show a still frame from it is going to be very useful.
The current workaround is to export a frame from the reference clip, import it back (oh, it would be great if I can just create a still frame and have it in the Media panel and thus skipping these steps). Then I can display it in the Trimmer window and use it as a reference for color grading.