h2 should be a h3 here.

Change-Id: Id3866dc929bae21eabac47066252ac77304e4365
Replace usage summary with last 5 jobs.

Usage summary requires cache data, which is generated by usage views.

Change-Id: I14ec3186db55f4b1f6e44d01e0845019b29d17f8
Fix kg_usage_job_list links.

Change-Id: Ib51240141350922fe9bc07ea4995044242fe2398