Add the option for URL prefix for registries

[Gonza10V]

Add a function to direct to the frontend and backend on different URLs like on SBOLCanvas.

[Kerem-G]

Create Collection should have description required

Take in Backend URL, Optional Frontend URL, Optional URI Prefix (Implicitly assume from left to right unless specified otherwise)

[cjmyers]

We need to update the entry for new registries to have 3 items:

Registry URL
Registry API
Registry Prefix (blocked as currently by the Edit button and warning, should usually match Registry URL)

Note Registry API is the one used to access SBH. Registry URL would be the name used in the list when selecting a registry.