New field for recording layout: clock.

With this change fields can be: short, wide, clock short or clock wide.
Fixes #1015.

src/main/java/de/dennisguse/opentracks/adapters/SettingsCustomLayoutAdapter.java

@@ -61,13 +61,8 @@ public class SettingsCustomLayoutAdapter extends RecyclerView.Adapter<RecyclerVi
         }
     }
 
-    @Override
-    public int getItemViewType(int position) {
-        return layout.getFields().get(position).isWide() ? CustomLayoutFieldType.WIDE.value() : CustomLayoutFieldType.SHORT.value();
-    }
-
     public boolean isItemWide(int position) {
-        return getItemViewType(position) == CustomLayoutFieldType.WIDE.value();
+        return layout.getFields().get(position).isWide();
     }
 
     public DataField getItem(int position) {