Don't make customer ID readonly when editing

i mean, custom apps are welome to, but seems a bit heavy-handed as default

tailbone/views/customers.py

@@ -172,10 +172,6 @@ class CustomersView(MasterView):
         customer = f.model_instance
         permission_prefix = self.get_permission_prefix()
 
-        # id
-        if not self.creating:
-            f.set_readonly('id')
-
         f.set_renderer('default_email', self.render_default_email)
         if not self.creating and customer.emails:
             f.set_default('default_email', customer.emails[0].address)