Sets the default action of this to detailed_action.
This action is activated when the notification is clicked on.
The action in detailed_action must be an application-wide action (it must start with "app."). If detailed_action
contains a target, the given action will be activated with that target as its parameter. See
parse_detailed_name for a description of the format for
detailed_action.
When no default action is set, the application that the notification was sent on is activated.
| this | |
| detailed_action |
a detailed action name |