message: Provide workaround for _GetFocusedTabIndex
  Use tabview.SelectedIndex for setting focus tab
  References
  Closes Closes Closes
diff: @@ -631,6 +631,8 @@ namespace winrt::TerminalApp::implementation
  void App::_SetFocusedTabIndex(int tabIndex)
  {
  + // GH#1117: This is a workaround because _tabView.SelectedIndex(tabIndex)
  + // sometimes set focus to an incorrect tab after removing some tabs
  auto tab = _tabs.at(tabIndex);
  _tabView.Dispatcher().RunAsync(CoreDispatcherPriority::Normal, [tab, this](){
  auto tabViewItem = tab->GetTabViewItem();
  @@ -815,7 +817,14 @@ namespace winrt::TerminalApp::implementation
  // - the index of the currently focused tab if there is one, else -1
  int App::_GetFocusedTabIndex() const
  {
  - return _tabView.SelectedIndex();
  + // GH#1117: This is a workaround because _tabView.SelectedIndex()
  + // sometimes return incorrect result after removing some tabs
  + uint32_t focusedIndex;
  + if (_tabView.Items().IndexOf(_tabView.SelectedItem(), focusedIndex))
  + {
  + return focusedIndex;
  + }
  + return -1;
  }
  void App::_OpenSettings()
  