Refs #17642 Destinet; improve api of symbols list

git-svn-id: https://svn.eionet.europa.eu/repositories/Naaya/trunk/eggs@20546 a0171fae-0946-0410-966d-b1775066cd26
Refs #17642 Destinet; added migration of category property

git-svn-id: https://svn.eionet.europa.eu/repositories/Naaya/trunk/eggs@20547 a0171fae-0946-0410-966d-b1775066cd26
Refs #17642 Destinet; added widget templates for new category properties

git-svn-id: https://svn.eionet.europa.eu/repositories/Naaya/trunk/eggs@20548 a0171fae-0946-0410-966d-b1775066cd26
Refs #17642 Destinet; improve widget handling of JS

git-svn-id: https://svn.eionet.europa.eu/repositories/Naaya/trunk/eggs@20549 a0171fae-0946-0410-966d-b1775066cd26