text: Title: Static text is considered as dynamic element (former: is_visible returns True for non-visible control)
  Body: I have a dialog window with multiple tabs (TabControl). After I switch from tab A to tab B, tabA.Control.is_visible() still returns True, despite the control on tab A is not being visible anymore. The control also doesn't show up in print_control_identifiers().
  I would expect False to be returned.