Thanks for this, I was looking in the list of shortcuts and it wasn't listed. Very strange. Anyway it's not exactly ideal on a tablet (need to have a bluetooth keyboard handy) but hey I guess it's 1st world problem really.
-edit- actually this doesn't seem to be an option here at all. Where's the keyboard shortcut option? I can't locate it at all :/ Using iPad / Safari here. Maybe some weird platform specific issue?
At the top of your screen, turn on Keyboard Shortcuts. Then hover over the module you would like to flip. Then press "F". Not as convenient as it used to be but it works.
-- farkas