deposit: communities merging fix

* Fixes an issue in how communities was merged into records.

Signed-off-by: Lars Holm Nielsen <lars.holm.nielsen@cern.ch>
base: curation buttons layout fix

* Fixes minor layout issue causing buttons to not be properly right
  aligned.

Signed-off-by: Lars Holm Nielsen <lars.holm.nielsen@cern.ch>
deposit: transfer ownership

* Adds method for transfering ownership of a deposition.

Signed-off-by: Lars Holm Nielsen <lars.holm.nielsen@cern.ch>