fix(upload): make media description multi line field (#1583)
fix(upload): make media description multi line field (#1583)

SDESK-4105
superdesk/superdesk-core,superdesk/superdesk-core,petrjasek/superdesk-core,petrjasek/superdesk-core,petrjasek/superdesk-core,superdesk/superdesk-core,superdesk/superdesk-core,petrjasek/superdesk-core