fix: sd-dropdown, sd-dialog and sd-drawer staying invisible when reopened during its hide animation #3402

Follow up ticket for #3384.

Reopening sd-tooltip while its hide animation was still running (~150 ms) left it open but
invisible: open === true, but body.hidden === true and popup.active === false.
Reachable by clicking the trigger three times quickly, or tabbing onto it, away and back.

• A show/hide that is superseded by a newer one now stops instead of finishing its work.
  stopAnimations() targets the element that is actually animated (popup.popup).
• A superseded show/hide no longer emits sd-after-show / sd-after-hide, so these events
  always match the final state. show() / hide() still resolve, once the latest
  transition has ended.
  Not part of this PR: sd-dropdown, sd-dialog and sd-drawer show the same defect.

• Fix sd-dropdown
• Fix sd-dialog
• Fix sd-drawer

Technical Information

DoR

• Item has business value
• Item has been estimated by the team
• Item is clear and well-defined
• Item dependencies have been identified