send option to user settings page if in-topic search is available (#4627)

src/controllers/accounts/settings.js

@@ -126,6 +126,8 @@ settingsController.get = function(req, res, callback) {
 
 		userData.allowUserHomePage = parseInt(meta.config.allowUserHomePage, 10) === 1;
 		
+		userData.inTopicSearchAvailable = plugins.hasListeners('filter:topic.search');
+
 		userData.title = '[[pages:account/settings]]';
 		userData.breadcrumbs = helpers.buildBreadcrumbs([{text: userData.username, url: '/user/' + userData.userslug}, {text: '[[user:settings]]'}]);