Update Travis CI configuration to run only on master branch against the latest mozilla-central nightly build
Wait for the comment field to be displayed before interacting with it
Dismiss the keyboard after sending keys to manual email setup fields
Skip email tests if account details are not present in test variables
Wait for the homescreen page transition to end
Split launch unit tests
Remove desktop specific manifest and add skip logic to main manifest for appropriate desktop tests
Use SkipTest from Marionette instead of unittest