For many users, finding something with Ctrl-f is one of the most frequent use cases. However, the usual, fastest and most comfortable way, to finish a modal dialog is ESC (Escape), which is not possible in Freeplane. So we all have to type Ctrl-f again, which is not a big deal but even after years it's pretty annoying because it's more complicated, takes longer and does not conform to most other word processing tools (which use ESC).
So as ESC currently does nothing in filter mode, couldn't you simply bind it to cancel the filter mode like another Ctrl-f does.
Thanks so much in advance, Marc