Odoo Release Updates

[FIX] mass_mailing: restore CRUD on ir.views for group_system

[IMP] mass_mailing(_sms): restore UI changes overwritten by another task

[ADD] base: update apps icons

[IMP] mass_mailing, *: template previews & mailing targets

[IMP] mass_mailing(_sms): improve user experience

[IMP] mass_mailing: ease contact import flows

[IMP] mass_mailing, *: tweak mailing list views

[IMP] mass_mailing: create lists in dialog

[IMP] web: apply left alignment to progressbar columns

[FIX] *: allow mailing user to create favorite snippets

[IMP] mass_mailing: replace "Add Template" button

[IMP] html_builder, *: rename `Img` component to `Image`

[MOV] html_editor: move signature plugin from `sign` to `html_editor`

[IMP] mass_mailing: mailing builder appearance tweaks

[REF] html_editor, *: use `checkPredicates` for all "some" predicates

[IMP] mass_mailing: allow disabling the exclusion list

[IMP] *: Remove the old syntax of t-call

[IMP] *: Remove the old syntax of t-call (cleanup)

[FIX] mass_mailing: fix wrong template strange xpath without inherit

[FIX] html_builder, mass_mailing: add custom snippets' group security

[FIX] *: allow mailing user to create favorite snippets

[IMP] html_builder, mass_mailing, website: add mass_mailing favorite snippets

[REF] html_builder, *: make options declaration and order XML-based

[REF] *: reduce datas usage

[IMP] *: remove unnecessary button "Discard" labels

[IMP] *: rename "Cancel" to "Discard"

[IMP] mass_mailing{_crm}: add tip on missing leads

[IMP] web: edit_tags_list

[IMP] mass_mailing: favorite template previews

[REF] web_studio, html_editor: Make dynamic field plugin generic