try to show correct back button

Signed-off-by: tobiasKaminsky <tobias@kaminsky.me>

app/src/main/java/com/owncloud/android/ui/activity/NotificationsActivity.kt

@@ -96,7 +96,8 @@ class NotificationsActivity : DrawerActivity(), NotificationsContract.View {
                 this,
                 it,
                 getString(R.string.drawer_item_notifications),
-                menuIcon)    
+                menuIcon
+            )
         }
     }