Added a space before all entries in @mention autocomplete (#3605)

webapp/components/suggestion/at_mention_provider.jsx

@@ -47,11 +47,11 @@ class AtMentionSuggestion extends Suggestion {
             username = user.username;
 
             if ((user.first_name || user.last_name) && user.nickname) {
-                description = ` - ${Utils.getFullName(user)} (${user.nickname})`;
+                description = `- ${Utils.getFullName(user)} (${user.nickname})`;
             } else if (user.nickname) {
-                description = ` - (${user.nickname})`;
+                description = `- (${user.nickname})`;
             } else if (user.first_name || user.last_name) {
-                description = ` - ${Utils.getFullName(user)}`;
+                description = `- ${Utils.getFullName(user)}`;
             }
 
             icon = (
@@ -80,6 +80,7 @@ class AtMentionSuggestion extends Suggestion {
                         {'@' + username}
                     </span>
                     <span className='mention__fullname'>
+                        {' '}
                         {description}
                     </span>
                 </div>