[FIX] base, web: BooleanFavoriteField wasn't translated

- BooleanFavouriteField wasn't translated as the component was using
  an untranslated variable instead of relying on the translation of
  the template.

Some other translation fixing:
- ID Azienda is very generic, the correct name is Numero REA:
  See: https://www.registroimprese.it/codice-fiscale-p.iva-rea
- No one calls a mobile phone "Dispositivo mobile", we already
  translate it as the more common "Cellulare" even in the same file

task-3263708

closes odoo/odoo#157949

Signed-off-by: Paolo Gatti (pgi) <pgi@odoo.com>

odoo/addons/base/i18n/it.po

@@ -16929,7 +16929,7 @@ msgstr "Dettagli azienda"
 #: model:ir.model.fields,field_description:base.field_res_partner__company_registry
 #: model:ir.model.fields,field_description:base.field_res_users__company_registry
 msgid "Company ID"
-msgstr "ID Azienda"
+msgstr "Numero REA"
 
 #. module: base
 #: model:ir.model.fields,field_description:base.field_res_company__logo
@@ -25694,7 +25694,7 @@ msgstr "Signor"
 #: model_terms:ir.ui.view,arch_db:base.contact
 #, python-format
 msgid "Mobile"
-msgstr "Dispositivo mobile"
+msgstr "Cellulare"
 
 #. module: base
 #: model:ir.model.fields,field_description:base.field_ir_actions_act_window__mobile_view_mode