fix(datepicker): auto closes in Chrome when md-open-on-focus is used

[Splaktar]

PR Checklist

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• The commit message follows our guidelines
• Tests for the changes have been added or this is not a bug fix / enhancement
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PR Type

What kind of change does this PR introduce?

[x] Bugfix
[ ] Enhancement
[ ] Documentation content changes
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Infrastructure changes
[ ] Other... Please describe:

What is the current behavior?

A regression in Chromium has caused date and time pickers around the Internet to instantly close when opened via a focus event due to a change in the timing of events. md-datepicker works better than most after going to the 100ms delay to fix Firefox, but it isn't always enough, especially when changing focus from one input to another.

Issue Number:
Fixes #11701

What is the new behavior?

Improve event handling based on suggestions by Navid Zolghadr.

• Timeouts are eliminated.
• stopPropagation() on click events from the input
• In Chrome use the setPointerCapture API to avoid auto closing on pointerdown events

Does this PR introduce a breaking change?

[ ] Yes
[x] No

Other information

Related Chromium regression: https://bugs.chromium.org/p/chromium/issues/detail?id=941910