Generic image viewer
Many users have reported wanting to be able to easily view images both directly following an import and at any later time. Currently it's possible to visualise images but only when there are already segmented objects in the database - either you use the segmentation editor, or you use the image view (but the latter requires you to build a dataset). What is desired is a simple image viewer that can be used even when no segmentation results exist in the database.
Once resolved, the confirmation of successful image import described in issue pickcells-essentials#36 should suggest the user uses the generic image viewer to view imported images.