Unify and link playground UI views

[GoebelL]

Summary Unify and link playground UI views

Details Currently account playground UI and several other places are redirecting back to the default marketplace pages. There is no unique naming scheme of playground pages.

• Link all playground pages
• Add respective navigation rules
• Renaming differing playground pages to follow the naming scheme playground<existing xhtml>

Acceptance criteria

• [ ] All pages following a unique naming scheme
• [ ] All actions redirecting to correct target respecting to from where they have been executed
  (playground UI or default UI)

Additional context Add any other context or screenshots about the task.

[GoebelL]

https://github.com/servicecatalog/oscm/issues/791 maybe related.