Cover "Project node (logged out)" in UI tests for Jenkins

[martinszuc]

UI test cases for component "Project node (logged out)":

• [x] Default node is shown as kubernetes.svc or similar (when no kubeconfig is present or user is not logged in)
• [x] Can login to a cluster in ~~different ways~~ with username/password
• [x] Paste Login Command works in Cluster login
• [ ] ~~Login via RH Developer Sandbox works~~ (so far not possible to automate)
• [x] Getting Started can be opened
• [x] About shows appropriate information (when logged in and logged out)