FxA module WIP
Fix IAC messaging
Merge pull request #47 from ferjm/fxa_module

Fix IAC messaging
Rename FxUI to FxAccountsUI
Ensure that the UI flow always returns a result
Merge pull request #49 from ferjm/fxa_module

Rename FxUI and send UI result back to chrome
Settings UI ready

Note - removed Persona UI from the settings app, rather than leave it
alongside the FXA UI. Merge was otherwise straightforward.

Conflicts:
	apps/settings/index.html
	apps/settings/style/settings.css
Merge branch 'borjasalguero-fxa_module' into 6a68-bug-905637-fxa-settings-app

Merging this because it hasn't landed in gaia yet. For tracking purposes,
the gaia PR is https://github.com/mozilla-b2g/gaia/pull/14101.

With any luck, this branch will actually work on a handset, if the right
gecko build is already present on device :-)

Conflicts:
	apps/system/index.html
	apps/system/manifest.webapp