Return the like status of a user over a group

src/controllers/GroupsController.ts

@@ -162,6 +162,7 @@ export class GroupsController {
 			data["url"] = info.url ? info.hasURL : "null";
 
 			data["number_likes"] = await LikesHelper.Count(info.id, LikesType.GROUP);
+			data["is_liking"] = h.signedIn ? await LikesHelper.IsLiking(h.getUserId(), info.id, LikesType.GROUP) : false;
 		}
 
 		return data;