fix: select date on Today click if today is max date

[web-padawan]

Description

Fixes #7505

Updated the logic to use "today midnight" for comparing with max. Without this change, the actual time is used and dateAllowed returns false when clicking "Today" button, thus making selecting today in this case impossible.

Type of change

• Bugfix

[sonarqubecloud]

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 @sissbruecker, 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 703939b
error: could not apply 703939b... fix: select date on Today click if today is max date (#7516)
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.alpha5 and is also targeting the upcoming stable 24.5.0 version.