Toggling subcategories in the sidebar is essential. We have nine categories and 19 subcategories already and I haven’t finished sorting. I expect to add 25 more subcategories. I would like them all to be available in the sidebar. Our corpus has been building since 1969 so our forum serves as a reference library as much as it does a symposium. For us, categories are both finding aids and conversation filters.
For that same reason, tags need to be alphabetic and scroll-able in the sidebar. We have 1400 tags and that will double by the time I am done sorting. Without a scroll window it will be impossible to present tags in a useful manner. In fact, a scroll window with a query box on top would be ideal.
It’s probably a separate discussion but putting tags in switchable pop-down windows under topic titles in list view would also be very helpful. Our topics have an average of 18 tags each. Our longest topic has 98 tags. When I present them all they obfuscate the topic titles. I mention it here because implementing a generic toggled scrollbox class could serve multiple useful purposes.
It would also be nice if the categories could be toggled open and close