Refresh the window when its layout direction changes in wxMSW.

Rearrange the window children and/or redraw its contents when its layout
direction changes.

See #15031.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_3_0_BRANCH@76979 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/window.cpp

@@ -1145,6 +1145,11 @@ void wxWindowMSW::SetLayoutDirection(wxLayoutDirection dir)
     if ( styleNew != styleOld )
     {
         wxSetWindowExStyle(this, styleNew);
+
+        // Update layout: whether we have children or are drawing something, we
+        // need to redo it with the new layout.
+        SendSizeEvent();
+        Refresh();
     }
 #endif
 }