Console page headers say what the page holds, in one line

The line under each page title in the tenant console now says what the page holds, and for whose data, in one sentence of 20 words or fewer.

• Retention under the list. Assistant health, email delivery, fleet delivery and deleted tenants show how long their records are kept, or how far back the page looks, in a short line under the list. It shows whether or not there are rows.
• A plainer dashboard. The dashboard heading no longer says who you are signed in as, and the Tenants card is gone. The sidebar’s Tenants entry is unchanged.
• One message for a stale page. When an action is refused because the page was out of date, the console now says so in the same words everywhere, then what the record is now.
• Register pages list the prompt files a register is composed from beside its badges, and the admin and customer register descriptions in the assistant are shorter.