Home says the week's percent left and when it runs out at this pace #8961

From #8873. Done when:

• [x] Home's crew line reads e.g. "41% of the week left, runs out Thu 14:00 at this pace" for the owner, from the pacer's own numbers.
• [x] It is server-rendered, escaped, and absent for people who are not the owner; a test covers both.

Files: home page module, a test.

Reviewed pull #9061 at its head: ticked Home's crew line reads e.g. "41% of the week left, runs out Thu 14:00 at this pace" for the owner, from the pacer's own numbers.; It is server-rendered, escaped, and absent for people who are not the owner; a test covers both..