Cost Control FTE is using an Iframe now

This is a build on @ypwater's fix for the FTU.
I believe I have fixed the sporadic fail/timing issue by changing the wait in the FTU.

http://qa-selenium.mv.mozilla.com:8080/job/b2g.unagi.gaia.master.ui.run_adhoc_tests.ril/1//console
http://qa-selenium.mv.mozilla.com:8080/job/b2g.unagi.gaia.v1-train.ui.run_adhoc_tests.ril/47/console

`master` -> Merge
`v1-train` -> OK to merge
`v1.0.1` -> Do not merge