Bug 1322411 - Use requestIdleCallback for scheduling job data refreshes.
Bug 1322411 - Use requestIdleCallback for scheduling job data refreshes.

This is a background task, so we should allow the browser to schedule it at some
time it isn't busy doing something more significant.

KWierso/treeherder,kapy2010/treeherder,tojon/treeherder,edmorley/treeherder,tojon/treeherder,tojonmz/treeherder,KWierso/treeherder,edmorley/treeherder,kapy2010/treeherder,edmorley/treeherder,kapy2010/treeherder,kapy2010/treeherder,tojonmz/treeherder,tojonmz/treeherder,kapy2010/treeherder,KWierso/treeherder,tojonmz/treeherder,edmorley/treeherder,tojonmz/treeherder,tojonmz/treeherder,KWierso/treeherder,tojon/treeherder,tojon/treeherder