Github: IDEA-111656 remove useless checkbox
Github: autodetect private repo in token generation
Github: IDEA-111659 Use separate "Create token" button
Github: don't throw AuthentificationException on IOException
Github: remember status code for exception caused by server reply
Github: disable button on empty parameters
Github: ask for credentials for correct host
Github: fix javadoc
Github: use string constant
Github: IDEA-92009 update repository before search for upstream remote
Github: IDEA-111654 IDEA-111653 Remove login field for token authentication
Github: fix issue with enterprise server (406: Not Acceptable)
PsiUtilBase.asVirtualFile, Overrides, remove duplicated code — please use PsiUtilCore.getVirtualFile