We need to add more context on the case level why the case may be important to investigate right now. There is correlation of already existing reverts on the accounts and the mitigation rate of those accounts from SI.

This is split off from T429346: Add case-level revert information to SI cases because it should be implemented after I7eecaa

Acceptance Criteria:

• change 'contribs' link text to "contribs (xx out of yy reverted)" on the account level
• if this is easy, add the account level reverts on the details page too (for both: details and sub details, which exist for some of the signals)