fix: only close combo-box overlay on blur from keyboard

[web-padawan]

Description

Fixes #7552

Changed the blur logic of vaadin-combo-box to only close when losing focus from keyboard, or if the opened is set to true but the overlay is not actually open (which is the case if no dropdown items match the filter).

This way we make sure that closing an opened combo-box happens on outside click (vs focusout) and therefore avoid closing of the parent vaadin-dialog (or vaadin-popover) - this is covered by new test in integration folder.

Also updated vaadin-time-picker to remove unnecessary value commit from focusout - in fact it was triggered twice in this case: first from focusout and then from combo-box change event. Now only the latter is used.

Type of change

• Bugfix

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

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

See analysis details on SonarCloud

[vaadin-bot]

Hi @web-padawan and @web-padawan, when i performed cherry-pick to this commit to 24.3, i have encountered the following issue. Can you take a look and pick it manually?
Error Message:
Error: Command failed: git cherry-pick fab9459
error: could not apply fab9459... fix: only close combo-box overlay on blur from keyboard (#7554)
hint: After resolving the conflicts, mark them with
hint: "git add/rm ", then run
hint: "git cherry-pick --continue".
hint: You can instead skip this commit with "git cherry-pick --skip".
hint: To abort and get back to the state before "git cherry-pick",
hint: run "git cherry-pick --abort".

[vaadin-bot]

This ticket/PR has been released with Vaadin 24.5.0.alpha6 and is also targeting the upcoming stable 24.5.0 version.