fix(docs-infra): correct select dropdown scrolling, sizing, and selec… by erkamyaman · Pull Request #69394 · angular/angular

…tion

Several issues in the shared docs `Select` component (used by the API
reference package filter):

- The options list never scrolled: its element used a class with no styles,
  so the intended max-height/overflow rule was dead. Point it at the styled
  class so long lists scroll within the popover.
- Selecting an option now closes the popup instead of leaving it open.
- Clip the trigger and popover corners (overflow: hidden) so their rounded
  borders render cleanly, and align the popover width with the trigger.
- Drop the selected-option checkmark. The component is single-select and
  already marks the selection with a highlight, so the tick was misleading.
- Remove the unused `disabled` input.