Update Czech translation by Jiri Eischmann
Update Czech translation by Jiri Eischmann

Reviewed by: Petr Kovar.

matzipan/evolution-data-server,tintou/evolution-data-server,Distrotech/evolution-data-server,gcampax/evolution-data-server,gcampax/evolution-data-server,matzipan/evolution-data-server,tintou/evolution-data-server,Distrotech/evolution-data-server,matzipan/evolution-data-server,tintou/evolution-data-server,Distrotech/evolution-data-server,Distrotech/evolution-data-server,tintou/evolution-data-server,gcampax/evolution-data-server,gcampax/evolution-data-server,Distrotech/evolution-data-server,matzipan/evolution-data-server,matzipan/evolution-data-server