workflows: clean up templates

* Reworks and simplifies workflow admin area.

* Cleans up and restructures templates, blueprints and static
  files to better conform with standard structures.

* Removes out-dated templates and JS files and combines related
  templates together.

* Updates unit-tests based on newest changes.

Signed-off-by: Jan Aage Lavik <jan.age.lavik@cern.ch>