Before this commit, the multi edition of a field using the daterange
widget wasn't really handled: only the field that was used for doing
the change (i.e. only the start or end date) was actually saved.
With this commit, the multi edit feature now supports the case where
editing a field actually triggers changes on other fields. All those
changes are displayed in the confirmation dialog.
Task 2555178
closesodoo/odoo#71545
Signed-off-by: Lucas Perais (lpe) <lpe@odoo.com>