Theme the Tree term reference widget in Biblio.
Add a gray border.
Merge 3.x
When creating a new publication journal article is default biblio type.
Keep controller.
Add correct arrows.
Merge pull request #5840 from openscholar/5777-2

Theme the "Term reference tree" widget in Bilbio
Merge pull request #5847 from openscholar/5815

When creating a new publication journal article is default biblio type.
Merge branch 'SCHOLAR-3.x' into 5821.