add default icon for non-user autocompletes

web/react/components/mention.jsx

@@ -6,10 +6,16 @@ module.exports = React.createClass({
         this.props.handleClick(this.props.username);
     },
     render: function() {
+        var icon;
+        if (this.props.id != null) {
+            icon = <span><img className="mention-img" src={"/api/v1/users/" + this.props.id + "/image"}/></span>;
+        } else {
+            icon = <span><i className="mention-img fa fa-users fa-2x"></i></span>;
+        }
         return (
             <div className="mentions-name" onClick={this.handleClick}>
-                <img className="mention-img" src={"/api/v1/users/" + this.props.id + "/image"}/>
-                <span>@{this.props.username}</span><span className="mention-fullname">{this.props.secondary_text}</span>
+                <div className="pull-left">{icon}</div>
+                <div className="pull-left mention-align"><span>@{this.props.username}</span><span className="mention-fullname">{this.props.secondary_text}</span></div>
             </div>
         );
     }

web/sass-files/sass/partials/_mentions.scss

@@ -56,3 +56,8 @@
 .mention-link {
 	color:$primary-color;
 }
+
+.mention-align {
+	position:relative;
+	top:5px;
+}