Stabilization and new tests

I am sorry for huge amount of code, this was my compass and next PRs will be done with fine granularity, I promise.

Fixes:
- fix labels
- fix workflows (many changes in OpenShift tools UI)
- fix timeouts
- workaround for opening context menu with submenus (bcs. of e4)

New tests:
- Multiple domain support tests
- Add/remove environment variable test
- Republish app (still needed support in UI tooling for showing Browser Editor to verify changes of content)
- implemented new application types - create/delete