Since frontend to backend commit [1], links having `enable_editor=1` to
enable edit mode were not working anymore in certain cases.
Case 1 [OK]*:
From frontend, click on `enable_editor=1` link without `/@/` in it.
Case 2 [OK]:
From frontend, click on `enable_editor=1` link with `/@/` in it.
Case 3 [KO]*:
From backend, click on `enable_editor=1` link without `/@/` in it.
Case 4 [KO]:
From backend, click on `enable_editor=1` link with `/@/` in it.
This commit fixes case 4 and adds a test for all cases, while leaving
case 3 commented as it will be fixed later with a larger fix related to
URL change listener.
* Note that we will probably change the behavior for case 1 and 3: if
the version with /@/ + enable_editor=1 enters edit mode properly in
both frontend and backend contexts (case 2 and 4), it's probably not
worth having code to support case 1 and 3.
The issue for case 4 was that it was trying to load the whole Odoo app
inside of website preview iframe instead of making the parent window
load that URL.
[1]: https://github.com/odoo/odoo/commit/31cc10b91dc7762e23b4bde9b945be0c4ce3fe3bclosesodoo/odoo#96054
Signed-off-by: Quentin Smetz (qsm) <qsm@odoo.com>