Remove deprecated action bar nav mode
diff --git a/app/src/main/java/org/apache/taverna/mobile/activities/DashboardMainActivity.java b/app/src/main/java/org/apache/taverna/mobile/activities/DashboardMainActivity.java
index e41fc52..d445219 100644
--- a/app/src/main/java/org/apache/taverna/mobile/activities/DashboardMainActivity.java
+++ b/app/src/main/java/org/apache/taverna/mobile/activities/DashboardMainActivity.java
@@ -270,7 +270,7 @@
 
     public void restoreActionBar() {
         ActionBar actionBar = getSupportActionBar();
-        actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
+        //actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
         actionBar.setDisplayShowTitleEnabled(true);
         actionBar.setTitle(mTitle);
     }