Don't suppress accelerators that include Enter just because a tree control is focused

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@49992 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/treectrl.cpp

@@ -1994,7 +1994,11 @@ bool wxTreeCtrl::MSWShouldPreProcessMessage(WXMSG* msg)
 {
     if ( msg->message == WM_KEYDOWN )
     {
-        if ( msg->wParam == VK_RETURN )
+        const bool isAltDown = ::GetKeyState(VK_MENU) < 0;
+
+        // Only eat VK_RETURN if not being used by the application in conjunction with
+        // modifiers
+        if ( msg->wParam == VK_RETURN && !wxIsCtrlDown() && !wxIsShiftDown() && !isAltDown)
         {
             // we need VK_RETURN to generate wxEVT_COMMAND_TREE_ITEM_ACTIVATED
             return false;