#327414 Change back button icon in Group Members view

app/groups/group-members/group-members.template.html

@@ -1,6 +1,6 @@
 <StackLayout class="cntnr">
     <ActionBarExtension>
-        <NavigationButton *ngIf="isAndroid"android.systemIcon="ic_menu_back" (tap)="onBack()"></NavigationButton>
+        <NavigationButton *ngIf="isAndroid" icon="res://icon_back" (tap)="onBack()"></NavigationButton>
         <ActionItem *ngIf="!isAndroid" ios.systemIcon="1" ios.position="left" (tap)="onBack()"></ActionItem>
         <ActionItem (tap)="onAdd()" *ngIf="canAdd"
             ios.systemIcon="4" android.systemIcon="ic_menu_add"