[IMP] web: Allow setting form_view_initial_mode in fullscreen
[IMP] web: Allow setting form_view_initial_mode in fullscreen

This commit lays the groundwork for the new work order tablet view,
which is a fullscreen form view that requires to be started in 'edit'
mode.

ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo