fdo#44582 fixing horizontal scroll bar in sub windows

Change-Id: Ifea57dec77c5b23771684a1e46267f8431478075
Reviewed-on: https://gerrit.libreoffice.org/1806Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>
Reviewed-on: https://gerrit.libreoffice.org/1908Tested-by: Lior Kaplan <kaplanlior@gmail.com>
Reviewed-by: Miklos Vajna <vmiklos@suse.cz>

vcl/unx/gtk/gdi/salnativewidgets-gtk.cxx

@@ -1041,7 +1041,12 @@ sal_Bool GtkSalGraphics::getNativeControlRegion(  ControlType nType,
             rNativeContentRegion.Right() = rNativeContentRegion.Left() + 1;
         if (!rNativeContentRegion.GetHeight())
             rNativeContentRegion.Bottom() = rNativeContentRegion.Top() + 1;
-        returnVal = sal_True;
+
+        returnVal = true;
+
+        //See fdo#44582, Horizontal scrollbar in navigator window is broken
+        if ((nPart==PART_BUTTON_LEFT || nPart==PART_BUTTON_RIGHT) && Application::GetSettings().GetLayoutRTL())
+            returnVal = false;
     }
     if( (nType == CTRL_MENUBAR) && (nPart == PART_ENTIRE_CONTROL) )
     {