fix(macos): scale menu item icon height to 18, closes #584

[grant0417]

What kind of change does this PR introduce?

• Bugfix
• Feature
• Docs
• New Binding issue #___
• Code style update
• Refactor
• Build-related changes
• Other, please describe:

Does this PR introduce a breaking change?

• Yes, and the changes were approved in issue [feat] Add support for dpi on menu icons on macos #584
• No

Checklist

• When resolving issues, they are referenced in the PR's title (e.g fix: remove a typo, closes #___, #___)
• A change file is added if any packages will require a version bump due to this PR per the instructions in the readme.
• I have added a convincing reason for adding this feature, if necessary

Other information

[grant0417]

Hey, @amrbashir I fixed the code you pushed, it worked but just needed the import and order changed on the function calls.

Thanks for all the help!

[amrbashir]

thanks @grant0417 for taking it to the finish line.