jobs_v2: provide feedback when a value is copied to the clipboard
jobs_v2: provide feedback when a value is copied to the clipboard

temporarily replace the copy icon with a green check or red X
to indicate the success or failure of the operation
(similar to what gerrit does)

test plan: when you click one of the copy-to-clipboard buttons
that appears in the jobs table on hover, the icon should turn into
a green check to indicate the copy succeeded

and when you leave and come back to the row, it should be a normal
clipboard button again

flag=jobs_v2
closes DE-1142

Change-Id: I772b187beaae011bf7d5818abcaee9356f09be00
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/289647
Tested-by: Service Cloud Jenkins <9144042a601061f88f1e1d7a1753ea3e2972119d@instructure.com>
Reviewed-by: Isaac Moore <258108225390078ef47d1319acab49ad7948abf1@instructure.com>
QA-Review: Jeremy Stanley <b3f594e10a9edcf5413cf1190121d45078c62290@instructure.com>
Product-Review: Jeremy Stanley <b3f594e10a9edcf5413cf1190121d45078c62290@instructure.com>

sfu/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,sfu/canvas-lms