refactor: extract overlay auto add controller

[sissbruecker]

This is another attempt at extracting common behavior for automatically adding overlay-based components to the UI. The previous PR (#6620) slightly modified the auto-removal behavior by running it in beforeClientResponse. That in turn caused a regression in Dialog, so the previous PR was reverted.

The reason for delaying the auto-close behavior was that:

• Flow always syncs properties first before running event listeners
• That means the opened property change listener in OverlayAutoAddController runs first and removes the component from the UI
• Event listeners are not run if the element is not in the UI
• In ConfirmDialog that can be a problem because clicking confirm / cancel buttons closes the dialog from the client (opened property change) and also sends confirm / cancel events which are then not be processed

As an alternative, this PR changes ConfirmDialog to:

• Not sync the opened property from client to server
• Instead use an opened-changed listener to change the opened property on the server
• With that other event listeners are still run, even if the opened-changed listener removes the component from the UI - the UI check only happens once before running all listeners
• Behavior should still be the same as before, where opened-changed also auto-removed the component

[sonarqubecloud]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud