DialogControlFlags::Mod1Tab is never set

Change-Id: If681e1f296934c7e20934b0e000a3288f989ed35

include/vcl/window.hxx

@@ -393,12 +393,11 @@ enum class DialogControlFlags
     NONE                       = 0x0000,
     Return                     = 0x0001,
     WantFocus                  = 0x0002,
-    Mod1Tab                    = 0x0004,
-    FloatWinPopupModeEndCancel = 0x0008,
+    FloatWinPopupModeEndCancel = 0x0004,
 };
 namespace o3tl
 {
-    template<> struct typed_flags<DialogControlFlags> : is_typed_flags<DialogControlFlags, 0x000f> {};
+    template<> struct typed_flags<DialogControlFlags> : is_typed_flags<DialogControlFlags, 0x0007> {};
 }
 
 // EndExtTextInput() Flags

vcl/source/window/dlgctrl.cxx

@@ -799,8 +799,7 @@ bool Window::ImplDlgCtrl( const KeyEvent& rKEvt, bool bKeyInput )
                 {
                     // Only use Ctrl-TAB if it was allowed for the whole
                     // dialog or for the current control (#103667#)
-                    if ( !aKeyCode.IsMod1() || (nDlgCtrlFlags & DialogControlFlags::Mod1Tab) ||
-                        ( pSWindow->GetStyle() & WB_NODIALOGCONTROL) )
+                    if (!aKeyCode.IsMod1() || (pSWindow->GetStyle() & WB_NODIALOGCONTROL))
                     {
                         if ( aKeyCode.IsShift() )
                         {