Don't show filters toolbar buttons on startup / in the "New comparison" window state
On startup, you have these three "Text Filters", "File Filters" and "Version Filters" buttons showing up:
...but they're not actually usable in that view, and all their popover menu items are deactivated, so it would be best to keep the UI clean and hide those buttons entirely when not needed at the start.
I think (?) this is the only case where all three show up at once (I can't think of a scenario where more than one at a time would be needed?)... and it makes for a bad visual impression and consumes space :)