See an overlay of where the clip's true end or start is when trimming

When dragging the ends of an already trimmed clip, we should see a ghost, low intrusive overlay that shows where the true end or start of the clip is. Like in the snapshot, I thought PP was doing this with that little dark grey bar to the left of the nested clip, (“oh wow a feature I didn’t know about!”) until I realized that wasn’t the start of the clip- the start of the clip is where it’s shown. PP must have been glitching with that grey bar.