[FIX] pad: remove wrong warning at pad creation

When creating a pad before this change these were the steps:

- modify pad URL for new pad URL
- end of record loading

This caused an issue because modifying the record at this point would
mark it as dirty before displaying it (which would result in a erroneous
warning "The record has been modified, your changes will be discarded.
Are you sure you want to leave this page ?").

With this fix:

- modifying the pad URL is done after the record is ready

- deferred have been unified (to remove possible race conditions)

closes #15239
opw-702797

forward port note: this change is needed up to saas-15, over saas-15
only a small part is needed (because x2many views are loaded with the
root view and there is one widget instance per record).

code note: it would be better to modify load_record of form view and
delay `record_loaded` upto after x2many views are loaded, but possible
impacts have been judged too risky so this is done only in pad widget.

0 files changed, 0 insertions, 0 deletions