Block menu and keyboard shortcuts

[ivteplo]

Lotion recognizes keyboard shortcuts as if Ctrl or Alt weren't pressed. For instance, if a user presses Ctrl+Z, then a letter z will be added to the search term, while in the editor the shortcut will work as it should (it will undo the last action).

Preventing a letter from being added when a user presses a shortcut is quite simple to do (just extra check for Ctrl and Alt keys). But I currently have no idea how to fix the difference between input and search term that is produced when a user presses Ctrl+Z or Ctrl+Backspace.