#8071742 My Home: Add Manage all domains quick link

Closes Automattic/dotcom-forge#2870.

Proposed Changes

Adds the “Manage all domains” link to Quick Links.

The “Add domain” and “Manage all domains” were added to the Quick Links for Devs:

Testing Instructions

1. Go to “My Home” on any site that you can manage;
2. Verify that the “Manage all domains” link appears below “Add a domain” in the Quick Links section;
3. Verify that clicking the button dispatches the calypso_customer_home_my_site_manage_all_domains_click Tracks event;
4. Open a site that was created through /setup/new-hosted-site and check that the links also appear in the Quick Links for Devs (don’t forget to toggle the developer mode in /me).