Masterbar: Add My Home menu item for Atomic sites

[creativecoder]

Changes proposed in this Pull Request:

• Adds the Customer Home link to the Masterbar for Atomic sites to keep parity with Calypso sidebar

This PR depends on

• A bug fix for blog requests to the /sites/{site} API in Sites API: Return options for Jetpack blog requests #13844
• Adding the My Home icon to the masterbar css D34250-code

Update: these dependencies have now been merged

Is this a new feature or does it add/remove features to an existing part of Jetpack?

See pb5gDS-2L-p2 for context

Testing instructions:

• Create a new Jetpack site (must be created on or after 2019-08-06) and connect to WordPress.com
• Install wpcomsh as a mu-plugin to emulate an Atomic Site
• When clicking on "My Sites" in the master bar, you should see "My Home" added

Alternatively, you can edit the Registered date of the Jetpack cached site at /wp-admin/network/site-info.php?id=SITE_ID to be after 2019-08-06.

Proposed changelog entry for your changes:

• Adds "My Home" link to Masterbar for sites hosted on WordPress.com

[jetpackbot]

Thank you for the great PR description!

When this PR is ready for review, please apply the [Status] Needs Review label. If you are an a11n, please have someone from your team review the code if possible. The Jetpack team will also review this PR and merge it to be included in the next Jetpack release.

Scheduled Jetpack release: January 14, 2020.
Scheduled code freeze: January 7, 2020

Generated by 🚫 dangerJS against 533712f

[creativecoder]

Now that D34250-code and #13844 have landed, this is ready for review.

[jeherve]

This works well for me, it should be good to merge. I only added tracking to the link in 533712f

[creativecoder]

Thanks for merging @jeherve !