feat(header): add 'Create Issue' help menu item to open GitHub issues (#3367)
feat(header): add 'Create Issue' help menu item to open GitHub issues (#3367)

fixes https://openshift.io/openshiftio/Openshift_io/plan/detail/784
fabric8-ui/fabric8-ui,fabric8-ui/fabric8-ui,fabric8io/fabric8-ui,fabric8io/fabric8-ui,fabric8io/fabric8-ui,fabric8io/fabric8-ui,fabric8io/fabric8-ui,fabric8-ui/fabric8-ui,fabric8-ui/fabric8-ui,fabric8-ui/fabric8-ui