Before this commit, the switchTheme option was redirecting the window to
the theme_install_kanban_action url.
After [1] was merged, the editor is instantiated inside the webclient
and the action can now be opened directly from there, without a reload.
For that, the request_save event data can include an 'action' parameter,
which the WysiwygAdapter will use after leaving debug mode to trigger
the action with the action service.
[1]: https://github.com/odoo/odoo/commit/31cc10b91dc7762e23b4bde9b945be0c4ce3fe3b
task-2687506
closesodoo/odoo#81485
Signed-off-by: Quentin Smetz (qsm) <qsm@odoo.com>