Ah yes, I used the control+F shortcut for a tool idea which was taken out after, but the hotkey was never reinstated for the flatnesstool. On my list
I've always used ctrl+L myself.
@drmex: a lot of people play mouse+keyboard at the same time, so yes those have only the left hand available for the keyboard.
Current other ideas for the next version:
Make the client remember claim visibility settings (by extension, homestead and heightmap too)
Fix the homestead pointer issue, where the old one does not disappear after moving your homestead.