[SDESK-3491] Allow a user preference to be registered on UI for subsequent updates to go through the api.
[SDESK-3491] Allow a user preference to be registered on UI for subsequent updates to go through the api.

petrjasek/superdesk-client-core,superdesk/superdesk-client-core,pavlovicnemanja/superdesk-client-core,pavlovicnemanja/superdesk-client-core,ioanpocol/superdesk-client-core,superdesk/superdesk-client-core,ioanpocol/superdesk-client-core,petrjasek/superdesk-client-core,pavlovicnemanja/superdesk-client-core,pavlovicnemanja/superdesk-client-core,superdesk/superdesk-client-core,mdhaman/superdesk-client-core,mdhaman/superdesk-client-core,ioanpocol/superdesk-client-core,superdesk/superdesk-client-core,superdesk/superdesk-client-core,petrjasek/superdesk-client-core,marwoodandrew/superdesk-client-core,marwoodandrew/superdesk-client-core,pavlovicnemanja/superdesk-client-core,mdhaman/superdesk-client-core,mdhaman/superdesk-client-core,marwoodandrew/superdesk-client-core,ioanpocol/superdesk-client-core,marwoodandrew/superdesk-client-core,marwoodandrew/superdesk-client-core,mdhaman/superdesk-client-core,ioanpocol/superdesk-client-core,petrjasek/superdesk-client-core,petrjasek/superdesk-client-core