Location update on geometry edit

[simon-leech]

The geometry location entry module has it's own update method instead of using the location.update() method.

The reason for this being that we wanted geometry edits / updates to be immediate. ie. They don't require the user to save changes.

Having duplicate code for the geometry update method is not ideal. Especially if the geometry entry is linked other entries.

The easiest solution would be to call the location update method which would mean that any other outstanding changes are updated as well when a geometry value is modified.