Custom option in the topic admin panel?

Development
2

Finally figured it out.

api.decorateWidget('topic-admin-menu:adminMenuButtons', (decorator) => {
					// Adds the button to the admin menu
					return {
						icon: 'ban',
						fullLabel: 'tl_post_lock.button_label',
						action: 'actionTlLock'
					}
				})
				
				api.attachWidgetAction('topic-admin-menu', 'actionTlLock', () => {
					// code
				})