fix double entry layout bug + remove unused usersGroup menu

Author: mythz

src/AndroidClient/androidchat/src/main/java/servicestack/net/androidchat/MainActivity.java

@@ -78,10 +78,6 @@ protected void onCreate(Bundle savedInstanceState) {
         InitDefaultBackground(chatBackground);
 
         navigationView.setTag(0);
-        navigationView.getMenu().clear(); //clear old inflated items.
-        navigationView.inflateMenu(R.menu.drawer_view); //inflate new items.
-        navigationView.inflateHeaderView(R.layout.nav_header);
-
         rightDrawer.setTag(1);
 
         MessageListViewAdapter messageHistoryAdapter = new MessageListViewAdapter(

src/AndroidClient/androidchat/src/main/res/menu/drawer_view.xml

@@ -6,13 +6,4 @@
             </group>
         </menu>
     </item>
-
-    <item android:title="Users" android:id="@+id/channelsItemUsers">
-        <menu>
-            <group android:checkableBehavior="single" android:id="@+id/usersGroup">
-
-            </group>
-        </menu>
-    </item>
-
 </menu>