changed some wording in user.json to use past participle tense

public/language/en_GB/user.json

@@ -74,9 +74,9 @@
 
 	"has_no_follower": "This user doesn't have any followers :(",
 	"follows_no_one": "This user isn't following anyone :(",
-	"has_no_posts": "This user didn't post anything yet.",
-	"has_no_topics": "This user didn't post any topics yet.",
-	"has_no_watched_topics": "This user didn't watch any topics yet.",
+	"has_no_posts": "This user hasn't posted anything yet.",
+	"has_no_topics": "This user hasn't posted any topics yet.",
+	"has_no_watched_topics": "This user hasn't watched any topics yet.",
 
 	"email_hidden": "Email Hidden",
 	"hidden": "hidden",