This is a semi-revert of 78bc56f33e and a correct fix for #3194.
The core issue is that the GUI handler must come behore the hotkey
handler, otherwise typing in boxes can set off hotkeys, and the hotkey
handler is repsonsible for updating the hotkey state.
Thus the GUI handler never has an up-to-date hotkey state, since that's
done later. 78bc56f33e fixed that by calling HotkeyInputHandler
manually, but that was still broken in some (unused) cases and was hacky
(indeed, it even looked hacky as noted by elexis).
The simplest fix is to split the 'hotkey creator' handler from the
'hotkey state change' handler, and run the 'hotkey state change handler'
before any other handler. Thus the gui handler remains in front of the
'hotkey creator' handler, but it has a correct hotkey state at any time.
Differential Revision: https://code.wildfiregames.com/D1839
This was SVN commit r22909.
