The plugin prime31/MetroEssentials has the function registerSettingsCommand
, which allows you to do just that.
// Registers a settings item with an associated message that will be displaed in a popup when clicked
public static void registerSettingsCommand( string title, string message )
// Registers a settings item with an action. When the settings item is clicked the action will be called.
public static void registerSettingsCommand( string title, Action onActivated )