fix: avoid losing focus on inputs when opening menu (Windows/Linux)

[erickzhao]

Description of Change

Fixes #18745.

Removes a call to give focus to the menu bar upon clicking an item, which was introduced in #15302 to improve menu bar a11y.

cc @brenca @javan

Checklist

• PR description included and stakeholders cc'd
• npm test passes
• PR title follows semantic commit guidelines
• PR release notes describe the change in a way relevant to app developers, and are capitalized, punctuated, and past tense.

Release Notes

Notes: Fixed bug where inputs would lose focus when opening the menu bar, preventing many menu items (Edit/Copy/Paste/etc.) to be unusable on Windows and Linux.

[ckerr]

This WfM on Ubuntu 19.04, testing with Javan's fiddle.

[erickzhao]

@brenca Let me know if removing this LoC will cause a regression regarding your previous PR. I tested it locally and noticed no difference, but I don't have a lot of context regarding Windows a11y.

[brenca]

LGTM, but I'd like to check the backports to ensure that a11y functionality doesn't suffer because of that LOC removal there.

[release-clerk]

Release Notes Persisted

Fixed bug where inputs would lose focus when opening the menu bar, preventing many menu items (Edit/Copy/Paste/etc.) to be unusable on Windows and Linux.

[trop]

I have automatically backported this PR to "7-0-x", please check out #19706

[trop]

I have automatically backported this PR to "5-0-x", please check out #19707

[trop]

I have automatically backported this PR to "6-0-x", please check out #19708

[javan]

This WfM on Ubuntu 19.04

This change didn't fix the issue on Windows (see #18745 (comment) for details). Was it only tested on Linux?