Change challenge searches to include category (#470)
Change challenge searches to include category (#470)

- Change challenge searches to include category name
MCLD/greatreadingadventure,haraldnagel/gra4,MCLD/greatreadingadventure,MCLD/gra4,haraldnagel/greatreadingadventure,iafb/gra4,MCLD/greatreadingadventure,iafb/gra4,haraldnagel/greatreadingadventure,haraldnagel/gra4,haraldnagel/greatreadingadventure,MCLD/greatreadingadventure,MCLD/greatreadingadventure,haraldnagel/greatreadingadventure,MCLD/gra4