Create a 'stack of images' viewer

[Federico M Pouzols]

One common task in image reconstruction is to select a region of interest on an stack of images. This is usually done while visualizing the stack with an image view widget + a slider to move throughout the stack of images. This is often done using tools like ImageJ.

Make a GUI to

• visualize stacks of images (at least the image widget + slider)
• select regions (in principle using the typical rectangular region selection tool)

Aim at sharing functionality and code with the Slice Viewer. For this, a new type of workspace (ImageStackWorkspace or similar, #11543) would come into play. The Slice Viewer works with any IMDWorkspaces.

Initially I add this ticket as 'blocked' by #11543, as that would be the proper way. A first implementation could use a quick and not-so-nice data structure, depending on schedules.

[Stuart Campbell]

This ticket has been transferred to github issue ​12477