Fixed potential crash when scrolling to selectiondialog item

src/selection_dialog.cpp

@@ -182,10 +182,11 @@ void SelectionDialogBase::show() {
       cursor_changed();
     }
     else if(list_view_text.get_model()->children().begin() != list_view_text.get_selection()->get_selected()) {
-      while(Gtk::Main::events_pending())
+      Glib::signal_idle().connect([this] {
-        Gtk::Main::iteration();
+        if((this == SelectionDialog::get().get() || this == CompletionDialog::get().get()) && is_visible())
-      if(is_visible())
+          list_view_text.scroll_to_row(list_view_text.get_model()->get_path(list_view_text.get_selection()->get_selected()), 0.5);
-        list_view_text.scroll_to_row(list_view_text.get_model()->get_path(list_view_text.get_selection()->get_selected()), 0.5);
+        return false;
+      });
     }
   }
   if(on_show)