Fix options menu.

(There's no screen class "ScreenOperatorMenu", and you can't have
multiple fallbacks--it's a simple chain, not a tree.)

stepmania/Themes/default/metrics.ini

@@ -2567,7 +2567,7 @@ Fallback=ScreenOperatorMenu
 Fallback=ScreenOperatorMenu
 
 [ScreenNetworkOptions]
-Fallback=ScreenOperatorOptions
+Fallback=ScreenOperatorMenu
 
 [ScreenBookkeeping]
 Fallback=ScreenOperatorMenu
@@ -2953,11 +2953,11 @@ MemoryCardIcons=1
 WrapCursor=0
 
 [ScreenOptionsSubmenu]
+Fallback=ScreenOperatorMenu
 Class=ScreenOptionsMaster
-Fallback=ScreenOperatorOptions
 
 [ScreenOperatorMenu]
-Fallback=ScreenWithMenuElements
+Fallback=ScreenOptions
 TimerOnCommand=hidden,1
 StyleIcon=0
 MemoryCardIcons=0
@@ -2966,11 +2966,6 @@ PrevScreen=ScreenOptionsMenu
 NextScreen=ScreenOptionsMenu
 CapitalizeAllOptionNames=0
 
-[ScreenOperatorOptions]
-Class=ScreenOperatorMenu
-Fallback=ScreenOptions
-Fallback=ScreenOperatorMenu
-
 [ScreenInputOptions]
 Fallback=ScreenOptionsSubmenu
 LineNames=1,2,3,4,5,6