fixes margin issue in the users lists

Author: demystifyfp

src/FsTweet.Web/assets/css/styles.css

@@ -119,6 +119,6 @@ p.well {
 }
 
 .user-card {
-  margin-top: 3 px;
+  margin-top: 10px;
   font-size: 25px;
 }