Refine the logic about gFunctionKeySetting, avoid some HII drivers can't show the hotkey info.

Also add missing code in UI.c

Signed-off-by: Eric Dong <eric.dong@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@14208 6f19259b-4bc3-4df7-8a09-765794883524

MdeModulePkg/Universal/SetupBrowserDxe/Setup.c

@@ -305,8 +305,6 @@ SendForm (
   //
   InitializeBrowserStrings ();
 
-  gFunctionKeySetting = ENABLE_FUNCTION_KEY_SETTING;
-
   //
   // Ensure we are in Text mode
   //
@@ -4009,6 +4007,8 @@ InitializeFormSet (
     }
   }
 
+  gFunctionKeySetting = ENABLE_FUNCTION_KEY_SETTING;
+
   if ((gClassOfVfr & FORMSET_CLASS_FRONT_PAGE) == FORMSET_CLASS_FRONT_PAGE) {
     gFrontPageHandle = FormSet->HiiHandle;
     gFunctionKeySetting = NONE_FUNCTION_KEY_SETTING;