Add feature MR-212 - Add option to connect without credentials

I have my username/password stored in mRemote, but sometimes i want to
log in as the service account or administrator account for various
reasons. This "new feature" allows you to quickly enter credentials
without changing other settings.
(cherry picked from commit 2ec0cdbc306b99ebf10614c7304a3b3960d6dbfe by cyclops1982)

Conflicts:
	mRemoteV1/Language/Language.Designer.vb
	mRemoteV1/Language/Language.resx