Exclude admin contact from list of group members

src/partials/messenger.receiver/group.html

@@ -27,7 +27,7 @@
 			</md-card-title>
 			<md-card-content>
 				<ul class="member-list">
-					<li ng-repeat="memberIdentity in ctrl.receiver.members">
+					<li ng-repeat="memberIdentity in ctrl.receiver.members" ng-if="memberIdentity != ctrl.receiver.administrator">
 						<eee-contact-badge
 								eee-identity="memberIdentity"
 								eee-linked="memberIdentity != ctrl.me.id"