[SEARCH] don't split search terms with comma
[SEARCH] don't split search terms with comma

Comma may be used in searched expression (e.g. with numbers in English,
comma is used to separate every three number).

fix SDESK-5771 (case 15b)

petrjasek/superdesk-client-core,superdesk/superdesk-client-core,petrjasek/superdesk-client-core,petrjasek/superdesk-client-core,superdesk/superdesk-client-core,superdesk/superdesk-client-core,superdesk/superdesk-client-core,superdesk/superdesk-client-core,petrjasek/superdesk-client-core,petrjasek/superdesk-client-core