Fix missed devise authentication step for workflows.

Was still trying to use the non-existent login_required method.
Merge branch '0.6.0-maint' into rh/player

* 0.6.0-maint:
  Fix missed devise authentication step for workflows.
Fixup the workflow show view.

Missed a link to start a run in here.
Make button text the same size as link text.

Buttons were 12px and links 16px for some reason.
Skin Service Credentials.
Fix button-style links so they don't float left.

Was causing too much hassle.