Show Conflicts when Editing Mouse Gestures
When I am editing mouse gestures, it seems that Vivaldi can only tell you that the given gesture has already been assigned, but it does not tell me the identity of the culprit.
I edited your thread and moved it to the right place. The posting time limits for new users is an anti-spam measure. When you get some reputation upvotes the time-limit between posts will be reduced.
A similar request already exists for keyboard shortcuts.
I only have a few mouse gestures defined, but I agree that it would help for those with a lot more than I have.