Feature idea: tag favorite row/object in catalogue tool

[lh-astro]

Within the catalogue tool a "star"-button for favorite rows/objects would be nice. So that for one session I can select the favorite objects and swap between normal view and favorite view. Maybe even different levels of favorites (5 colours of stars as a symbol or something like that). I see it as some sort of tag system which persists for the time of session (maybe longer if you can think of a way to make it persistent).