Odoo Release Updates

[REF] html_editor, *: rename predicates in the form of questions

[FIX] website: preserve vertical video alignment after save

[IMP] website,base,*: replace 'request.env' with 'env' in templates

[FIX] website: fix KeyError `manual` while submitting form with studio file field

[FIX] html_builder, *: fix pill shape

[FIX] html_builder: avoid hover overlay on top of active overlay

[FIX] website: fix image-related failing tests

[IMP] website: translate search result names in search bar

[REF] html_editor, *: rename async predicate to show it's async

[FIX] website: prevent error when sending digest email without website

[FIX] website: avoid empty option for grid

[REF] html_editor, *: rename some misleadingly named resources

[REF] html_editor, *: turn normalize_handlers into processors

[REF] html_editor, *: turn clean_for_save_handlers into processors

[FIX] website, *: adapt snippet products arrows position

[FIX] website: fix the infinite loop on onPlaceChanged

[REF] html_editor, *: turn a few more handlers into processors

[IMP] html_builder, website: notification instead of traceback for invalid fields

[IMP] core: random serial for testing

[FIX] website, website_blog: fix dynamic snippets visibility

[FIX] website, tools: make `<select>` options individually translatable

[FIX] web,*: Hoot - dynamic active element

[REF] *: Remap useExternalListener import to owl2/utils

[IMP] html_builder, *: move button styles option to sidebar

[REF] *: remap reactive import to owl2/utils

[MOV] http: move serving outside request

[FIX] website: allow copyright bg color when footer has no bg color

[FIX] website, website_sale: avoid timeout dialog actions

[IMP] html_builder, website[_sale]: ui improvements

[REF] website: generate HeaderTemplateOption from resource