fix #1612: show a dialog error with a contact us button after 3 login errors
add a third button option to the NUX dialog
add a FAQ button on repeated login error
change username_or_password_incorrect_third_time string
Merge branch 'develop' into issue/1612-contact-us-button-after-repeated-login-failures

Conflicts:
	WordPress/src/main/java/org/wordpress/android/ui/accounts/NewAccountAbstractPageFragment.java
	WordPress/src/main/java/org/wordpress/android/ui/accounts/WelcomeFragmentSignIn.java
remove unused tag in helpshift
use ACTION_OPEN_URL to open the lost password page
change the username_or_password_incorrect_third_time string
use the normal username_or_password_incorrect string even after 3+ login failures
use a switch instead of several ifs
don't show the Contact us button if Helpshift feature is disabled
move isAdded check down to showError(String message)
Merge pull request #1925 from wordpress-mobile/issue/1612-contact-us-button-after-repeated-login-failures

fix #1612 contact us button after repeated login failures