Close dropdown after executed action workaround

[madsrasmussen]

This PR is a workaround for the bug and fixes #19295

For one reason or another, the 'umb-dropdowndoesn't toggle the popover when the.open` property is set. I have added two methods to open and close the dropdown, which do the same thing but actually work.

[Copilot]

Pull Request Overview

This PR implements a workaround for the dropdown toggling bug by replacing the binding to the .open property with explicit method calls.

• In entity-actions-bundle.element.ts, the _dropdownIsOpen state is removed and replaced with a query-based dropdown element that calls closeDropdown() when an action is executed.
• In dropdown.element.ts, the updated() lifecycle now warns users and calls openDropdown() or closeDropdown() directly instead of relying on the non-functional .open property.

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
src/Umbraco.Web.UI.Client/src/packages/core/components/entity-actions-bundle/entity-actions-bundle.element.ts	Removed state-based toggling and replaced it with direct method calls on the dropdown element.
src/Umbraco.Web.UI.Client/src/packages/core/components/dropdown/dropdown.element.ts	Updated the lifecycle to warn against using the .open property and to invoke the new dropdown methods.