Fix fp tests + prevent waitFor killing runner
Revert navigationFilter changes
Merge pull request #227 from muffinresearch/fix-fp-test-and-waitfor

Fix fp tests + prevent waitFor killing runner
We don't need no stinking force_button (bug 841471)
Settings pages should go back to the homepage (bug 804759)
Download no previews when trays are hidden
disable autocorrect and autocapitalize for search (bug 890569)
don't load tray images on homepage (bug 894723)
cleanup unnecessary body class
Allow purchase button to revert to price on cancel (bug 895626)
Add never_incompat setting for great debugging
increase clear search click target (bug 892245)
Fix buttons problems related to sign-in
Remove particularly noisy log statement
Skip record iff the user has installed the app previously (bug 884701)
Better notifications around buttons (bug 894096)

Less ambiguous notifications when going through the purchase and install
flows.
update pt-br; bug 895041 p=fernando
Get a new button reference after purchase flow (bug 894421)
Use actual mocked navpay setting to enable live debugging
Use fake mozPay on demand rather than mocking on init