Add text overrun behavior for the theme type selector

editor/plugins/theme_editor_plugin.cpp

@@ -3381,6 +3381,7 @@ ThemeTypeEditor::ThemeTypeEditor() {
 
 	theme_type_list = memnew(OptionButton);
 	theme_type_list->set_h_size_flags(SIZE_EXPAND_FILL);
+	theme_type_list->set_text_overrun_behavior(TextServer::OVERRUN_TRIM_ELLIPSIS);
 	type_list_hb->add_child(theme_type_list);
 	theme_type_list->connect("item_selected", callable_mp(this, &ThemeTypeEditor::_list_type_selected));