Do not reset framing image when switching to sequence

[Former user]

Framing is a powerful tool for mosaic imaging. But adding a sequence from that screen switches automatically to the sequence screen. That causes the framing screen to reset the image and then you lose context of where the previous frame were. I suggest two things: 1. do not reset the framing image when switching to other screens. 2. Add a checkbox that will say "show previous frames" - when enabled this will show the previous frames on the same screen if of course they are inside the current coordinates.

[Stefan B]

it's possible to quickly reload the image via the cache. clearing the image is done to reduce memory pressure on some ressource restricted systems.