Bug 1322411 - Use requestIdleCallback to get jobs data updates. (#2022)
Bug 1322411 - Use requestIdleCallback to get jobs data updates. (#2022)

* Bug 1322411 - Refactor some resultset_store.js code to use es6 features

In particualr use some fat arrow functions and reformat a little
code for improved brevity and clarity.

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