Adding ignore_menuitem into LeftAndMain

[catharsisjelly]

Description

Adds the configuration ignore_menuitem into LeftAndMain so that anyone looking at the class will knows that this configuration exists. This will also now show up in the API docs (I think).

Issues

• ignore_menuitem is not documented because is not declared #1845

Pull request checklist

• The target branch is correct
  • See picking the right version
• All commits are relevant to the purpose of the PR (e.g. no debug statements, unrelated refactoring, or arbitrary linting)
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• This change is covered with tests (or tests aren't necessary for this change)
• Any relevant User Help/Developer documentation is updated; for impactful changes, information is added to the changelog for the intended release
• CI is green

[catharsisjelly]

This is aimed to fix it in the main branch, happy to rebase it to another if needed. It could be also implemented in 1.x

[GuySartorelli]

Thanks for doing this. You've got the correct branch - new API definitions belong in minor releases, and the 2 branch represents the April 2025 minor release currently.

[GuySartorelli]

LGTM, thanks for doing this.
Will merge once CI has finished running and goes green.

[GuySartorelli]

There's a linting failure related to your change. Can you please resolve that?

[GuySartorelli]

LGTM, thanks for this.