I have some custom CSS that puts a box around each category, but even with this disabled, the X or close button in the top right corner of chat windows does not show up. Edit: Looks like it only does it with the Flatly theme. If I go into my settings on this site and select Flatly, it does it here as well.
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Yeah I know what you mean, the board index can get a bit cluttered with the masonry effect. A sidebar widget listing all categories would be useful. I definitely want to try a more "traditional" forum layout in my next theme design 🙂