[FIX] web: m2o+o2m in o2m onchange no lose data

Steps:

- open a modal form view from tree view first line and make a change
- open a modal from the second line and make a change
- open the second line back: the change were lost

In a given number of conditions (a many2one inside the form view, there
is a one2many in the form view not inside the tree view, ....) this
happened because:

- when we save the first line, we get onchange data for the second one
- this onchange data can't be applied before second line is loaded, but
  it is saved so it can be applied if second line is ever opened
- when the second line is opened the saved change is applied => OK
- when the second line is opened a second time the saved change is
  applied again, possibly overwriting posterious change => BAD

With this changeset, when the record with unapplied onchange is loaded
for the first time, the unapplied onchange is applied only once.

Added test without the change failed with:

- only 1 turtle for second partner (result: 0 not 1)
- second partner turtle is Michelangelo (result: "" not "Michelangelo")

opw-1846820
closes #28644

0 files changed, 0 insertions, 0 deletions