add a default action to a setting: for text click

src/settings/general/context-children-show-mode.ts

@@ -22,6 +22,7 @@ const context_children_show_mode: Setting = {
   ],
   source: () => settings().contextChildrenShowMode,
   action: (value: mode) => settings().setContextChildrenShowMode(value),
+  defaultAction: () => settings().toggleContextChildrenShowMode(),
 };
 
-export default [context_children_show_mode];
+export default [context_children_show_mode];