base: pub links on brief format fix

* Fixes links in `access rights` and `pubtype` field.

* Removes link from `uploaded by` field.

Signed-off-by: Adrian Pawel Baran <adrian.pawel.baran@cern.ch>
global: new publication subtype `Proposal`

* Adds `Proposal` subtype to `Publications`.

Signed-off-by: Adrian Pawel Baran <adrian.pawel.baran@cern.ch>