added addBack() in showQuotientConfig

geom-exp.cpp

@@ -82,6 +82,8 @@ void showQuotientConfig() {
   dialog::addItem("activate", 'x');
   dialog::addItem("default", 'c');
   
+  dialog::addBack();
+
   keyhandler = [&gxcur] (int sym, int uni) {
     if(uni >= 'a' && uni < 'a' + isize(fgeomextras))
       current_extra = uni - 'a';