[REF] Removed unused IndicoCache
[FIX] empty contribution produces empty zip file

*#1257 raise NoReportError instead
[IMP] Add some __repr__ methods
[MIN] Interesting events. Still very much WIP
[IMP] Add task to update category suggestion info
[FIX] CategoryDisplay UH when used w/o target param

e.g. in the http api when fossilizing
[IMP] Show suggestions in the dashboard
[FIX] Missing >
[FIX] Unusuggest category when removing it from favs