Some commands from the powerBox command bar were not working
properly in the e-shop product "terms and conditions" section.
This was due to the isolation of Odoo fields
inside the odoo editor as a all.
Those fields do not always have an editable block element
to apply the command on.
We disable some commands that should not be apear in this context.
We also remove a redundant command (separator) in website pages.
task-2962067
closesodoo/odoo#107174
X-original-commit: 3776faa178314c4df889f4c04cc3931f8bef225c
Signed-off-by: David Monjoie (dmo) <dmo@odoo.com>