message: Disable Find when no repository is open
  This fixes a crash when pressing Ctrl-F or clicking Edit -> Find...
  with no repository opened.
diff: @@ -786,10 +786,11 @@ void MenuBar::updateFind()
  {
  MainWindow *win = qobject_cast<MainWindow *>(window());
  EditorWindow *editor = qobject_cast<EditorWindow *>(window());
  + RepoView *view = win ? win->currentView() : nullptr;
  bool empty = FindWidget::text().isEmpty();
  - mFind->setEnabled(win || editor);
  - mFindNext->setEnabled((win || editor) && !empty);
  - mFindPrevious->setEnabled((win || editor) && !empty);
  + mFind->setEnabled(view || editor);
  + mFindNext->setEnabled((view || editor) && !empty);
  + mFindPrevious->setEnabled((view || editor) && !empty);
  }
  void MenuBar::updateView()
  