Always show Popover footer regardless of Popover inner scroll (#16308)

frontend/src/metabase/components/FieldValuesWidget.jsx

frontend/src/metabase/components/Popover.css

frontend/src/metabase/components/TokenField.jsx

...se/parameters/components/widgets/ParameterFieldWidget.jsx

.../query_builder/components/filters/FilterPopoverFooter.jsx

...e/query_builder/components/filters/pickers/DatePicker.jsx

...uery_builder/components/filters/pickers/DefaultPicker.jsx

...abase/internal/__snapshots__/components.unit.spec.js.snap

frontend/test/metabase/scenarios/question/filter.cy.spec.js

.../test/metabase/scenarios/sharing/subscriptions.cy.spec.js