Add support in the GUI to set/interpret extended/custom headers

[skliper]

Is your feature request related to a problem? Please describe.
GUI sets/interprets cfs version 1 headers, and then skips data to "support" the other header types. Can't set or display extended or custom header data.

Describe the solution you'd like
Add support, preferably via a generic capability that can be customized (EDS/XTCE or other data description header definition).

Describe alternatives you've considered
Use a more capable/full function ground system if you need v2 or custom headers

Additional context
None

Requester Info
Jacob Hageman - NASA/GSFC

[skliper]

An offset is available, but you can't actually set that data... (or interpret it).