Improve order status tabs

[kamal0808]

Thoughts on improving to be put here.

[elbrando]

1. Remove Fulfill tab altogether and/or make it visible only for users that are Packers/Shippers/Fulfillers (plus super-users, of course).
2. Change "Fulfillment pending" to "Submitted" or "Submit successful" and bold
3. (more to come)

[kamal0808]

Requires user roles to be set up