The external button of the Many2one field has been changed with the
"always edit" feature of the form view, s.t. it displays by default
another icon (a right arrow) and when clicked, opens the related
record in another plain screen action instead of a FormViewDialog.
However, this doesn't work for Many2One fields that are already in
dialogs, because
1) if it's an action dialog (target="new"), that dialog will be
closed when opening the related record and the user loses its
working context
2) if it's another type of dialog (e.g. FormViewDialog), the
related record opens in the background and the dialog remains
open, which is obviously a bad UX experiment. This had been
locally fixes at some places [2].
This commit fixes the issue by automatically opening the related
record in a FormViewDialog if the Many2One is itself already in a
dialog.
This commit also fixes an issue with the scenario where the related
record opens in a dialog: if there were changes done in the main
record, those changes where lost when the user clicked on "Save"
in the dialog of the related record. We now only reload the
display_name of the related record, and apply it to the model.
[2] https://github.com/odoo/enterprise/commit/ba0e95fe42696dcf44b8feddeb302f04876fcbdc
Task 3191319
closesodoo/odoo#112959
Related: odoo/enterprise#37213
Signed-off-by: Aaron Bohy (aab) <aab@odoo.com>