[4.4] Fix event target in menu.js

[SniperSister]

Summary of Changes

The core menu.js dynamically adds aria-hidden=true attributes to ul tags on menu level 2:

However, on focus and hover, these attributes aren't always set to "false" (which would be correct as the previously invisible dropdown now is possible) as the JS has a bug. It uses the target attribute of the event, which is not the element that the eventhandler was bound to (=the parent <li>) but the element that triggered the event, i.e. a nested a or span tag.

It should use currentTarget.

See msdn:
https://developer.mozilla.org/en-US/docs/Web/API/Event/currentTarget

Testing Instructions

Create a test site with a multi-level menu that uses the "default" menu layout. Make sure that the menu.js is loaded and the aria-hidden attribute is appended. Now hover over the element.

Actual result BEFORE applying this Pull Request

aria-hidden isn't updated reliably.

Expected result AFTER applying this Pull Request

aria-hidden is updated reliably.

Link to documentations

Please select:

• Documentation link for docs.joomla.org:

• [x ] No documentation changes for docs.joomla.org needed

• Pull Request link for manual.joomla.org:

• [ x] No documentation changes for manual.joomla.org needed

[fgsw]

I have tested this item ✅ successfully on 1dc9365

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/44019.}

[viocassel]

I have tested this item ✅ successfully on 1dc9365

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/44019.}

[Quy]

RTC

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/44019.}

[MacJoom]

Thank you!