settings: allow edittoggle to be reconfigured

"editbind E edittoggle" is needed for such cases, when edittoggle will be
bounded to key, for which editbind exists. Then that will allow to
exit from edit mode still with use a key.

config/menus_settings.cfg

@@ -268,6 +268,7 @@ menuitemkeyinput [Screenshot: ]      screenshot
 menuitemkeyinput [Map overview: ]    key_showmap
 menuitemkeyinput [Drop CTF flag: ]   dropflag
 menuitemkeyinput [Fullscreen: ]      fullscreentoggle
+menuitemkeyinput [Edit map: ]        edittoggle
 menuitem [] -1
 menuitemtextinput [Lookup a keybind: ] [] [ echo []; echo (concatword (c 9) [Contents of keybind ] $arg1 :); echo (keybind $arg1) ] [] 256
 menuitem [Alternate edit binds...] [ showmenu [Alternate edit binds] ]

config/resetbinds.cfg

@@ -94,6 +94,7 @@ bind C []
 editbind C copy
 bind D right
 bind E edittoggle
+editbind E edittoggle
 bind F []
 editbind F [ solid 1 ]
 bind G quicknadethrow