Fix #1426 - Trim long usernames in public follower/following lists (#2993)

Fix #2221 - Catch OpenSSL exceptions when loading remote avatars/headers/attachments
Don't strip "rel" attribute from <a> tags when sanitizing (microformats)

app/javascript/styles/accounts.scss

@@ -302,6 +302,8 @@
         display: block;
         color: $ui-base-color;
         text-decoration: none;
+        text-overflow: ellipsis;
+        overflow: hidden;
 
         &:hover {
           .display_name {