Add target blank to sidebar menu via JS

[thijsoo]

Context

• We want to open de upgrades page in a new tab.

Summary

This PR can be summarized in the following changelog entry:

• Makes the upgrade button in the WordPress sidebar open in a new tab.

Relevant technical choices:

Test instructions

Test instructions for the acceptance test before the PR gets merged

This PR can be acceptance tested by following these steps:

• Make sure that our Upgrades button in the WP sidebar opens in a new tab.
• With premium make sure there are no JS errors.

Relevant test scenarios

• Changes should be tested with the browser console open
• Changes should be tested on different posts/pages/taxonomies/custom post types/custom taxonomies
• Changes should be tested on different editors (Default Block/Gutenberg/Classic/Elementor/other)
• Changes should be tested on different browsers
• Changes should be tested on multisite

Test instructions for QA when the code is in the RC

• QA should use the same steps as above.

QA can test this PR by following these steps:

Impact check

This PR affects the following parts of the plugin, which may require extra testing:

Other environments

• This PR also affects Shopify. I have added a changelog entry starting with [shopify-seo], added test instructions for Shopify and attached the Shopify label to this PR.

Documentation

• I have written documentation for this change. For example, comments in the Relevant technical choices, comments in the code, documentation on Confluence / shared Google Drive / Yoast developer portal, or other.

Quality assurance

• I have tested this code to the best of my abilities.
• During testing, I had activated all plugins that Yoast SEO provides integrations for.
• I have added unit tests to verify the code works as intended.
• If any part of the code is behind a feature flag, my test instructions also cover cases where the feature flag is switched off.
• I have written this PR in accordance with my team's definition of done.
• I have checked that the base branch is correctly set.

Innovation

• No innovation project is applicable for this PR.
• This PR falls under an innovation project. I have attached the innovation label.
• I have added my hours to the WBSO document.

Fixes #

[coveralls]

Pull Request Test Coverage Report for Build d6a15e7b85f26b56d8cbed75a6bcba7d5462d1c3

Details

• 0 of 4 (0.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.5%) to 53.26%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
packages/js/src/admin-global.js	0	4	0.0%

Totals
Change from base Build c7dc657b718d057bb276c15d62fc8ad77f72b792:	0.5%
Covered Lines:	31724
Relevant Lines:	59771

---

💛 - Coveralls

[vraja-pro]

CR & AC ✅