Hide delete icon for new caldav collections

app/src/main/java/org/tasks/caldav/CaldavCalendarSettingsActivity.java

@@ -131,7 +131,9 @@ public class CaldavCalendarSettingsActivity extends ThemedInjectingAppCompatActi
             save();
           }
         });
+    if (caldavCalendar != null) {
       toolbar.inflateMenu(R.menu.menu_caldav_calendar_settings);
+    }
     toolbar.setOnMenuItemClickListener(this);
     MenuColorizer.colorToolbar(this, toolbar);
 
@@ -340,7 +342,7 @@ public class CaldavCalendarSettingsActivity extends ThemedInjectingAppCompatActi
   @Override
   public boolean onMenuItemClick(MenuItem item) {
     switch (item.getItemId()) {
-      case R.id.remove:
+      case R.id.delete:
         deleteCollection();
         break;
     }

app/src/main/res/menu/menu_caldav_calendar_settings.xml

@@ -3,9 +3,9 @@
   xmlns:app="http://schemas.android.com/apk/res-auto">
 
   <item
-    android:id="@+id/remove"
+    android:id="@+id/delete"
     android:icon="@drawable/ic_delete_24dp"
-    android:title="@string/remove"
+    android:title="@string/delete"
     app:showAsAction="ifRoom"/>
 
 </menu>