Fix failing `karma` job on master

karma job is breaking master 😞

Finished in 4 mins 25.575 secs / 4 mins 8.555 secs @ 05:03:10 GMT+0000 (Coordinated Universal Time)

SUMMARY:
✔ 9066 tests completed
✖ 1 test failed

FAILED TESTS:
  Dashboard
    metrics with alert
      without license
        ✖ hides More actions dropdown on chart
          Chrome
        Expected true to be false.
            at webpack:///builds/gitlab-org/gitlab-ee/ee/spec/javascripts/monitoring/components/dashboard_spec.js:1578:1 <- spec/javascripts/test_bundle.js:586549:24

TOTAL: 1 FAILED, 9066 SUCCESS