use a recursive setTimeout instead of an interval for focus polling - fixes #391
Fixed background flash on first load and fixed top and bottom padding.
Merge pull request #394 from mozilla/issue391-focus-fix

use a recursive setTimeout instead of an interval for focus polling
Merge pull request #388 from mozilla/issue-339-background-flash

Fixed background flash on first load
Merge pull request #398 from pdehaan/signin_copy

Fixes #380 and #378