fix(Portal): fix event handling for mouseEnter/mouseLeave

[tourman]

Fixing #4442 and other other similar typo.

[welcome]

💖 Thanks for opening this pull request! 💖

Here is a list of things that will help get it across the finish line:

• Run yarn lint locally to catch formatting errors. This will fix some errors automatically, commit and push any changes.
• Run yarn test locally to catch errors. This ensures all components still behave as they should.
• Run yarn start to run the doc site locally and try a few pages, ensuring everything is in good working order.
• Include tests when adding/changing behavior.

We get a lot of pull requests on this repo, so please be patient and we will get back to you as soon as we can.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (ba4b720) 99.51% compared to head (eb03d99) 99.51%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #4445   +/-   ##
=======================================
  Coverage   99.51%   99.51%           
=======================================
  Files         186      186           
  Lines        3511     3511           
=======================================
  Hits         3494     3494           
  Misses         17       17           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[welcome]

Congrats on merging your first pull request! 🎉🎉🎉

[dimitur2204]

@layershifter Is there a date/schedule for the release for this one?

[layershifter]

Released in 3.0.0-beta.2 🎉