If I have a repo view that is filtered to show, say, only adds, and I then select the top-level folder and choose "Revert", it sends the top-level folder to Hg as the target. This was not what I expected. This reverts everything, including files that were hidden by my filter. It would be nice if, instead, it would send the list of visible files--and also very useful.
The UI is a little bit of a challenge, because it's entirely feasible people other than me will have the complete opposite expectation.
Also, there may be some other commands that could benefit from this treatment, though I can't think what they would be at this moment in time.