(js) Improve sgAvatarImage

UI/Templates/AdministrationUI/UIxAdministrationAclEditor.wox

@@ -25,10 +25,8 @@
       <md-toolbar flex-none="flex-none">
         <div layout="row">
           <sg-avatar-image class="md-tile-left"
-                           ng-show="acl.user.isGroup === 0"
                            sg-email="::acl.user.c_email"
-                           size="40"><!-- avatar --></sg-avatar-image>
-          <div class="sg-list-avatar" ng-show="acl.user.isGroup"><!--list avatar--></div>
+                           size="40">{{acl.user.$avatarIcon}}</sg-avatar-image>
           <div class="msg-header-content">
             <h1 ng-class="{ 'sg-md-display-2--thin': isGtMedium,
                             'sg-md-title': !isGtMedium }">{{::acl.user.cn}}</h1>