remove highlight when card dropped
remove highlight when card dropped

cryogen/throneteki,DukeTax/throneteki,cryogen/gameteki,cryogen/gameteki,Antaiseito/throneteki_for_doomtown,ystros/throneteki,samuellinde/throneteki,jeremylarner/ringteki,jeremylarner/ringteki,DukeTax/throneteki,cavnak/throneteki,cavnak/throneteki,jeremylarner/ringteki,Antaiseito/throneteki_for_doomtown,cryogen/throneteki,gryffon/ringteki,samuellinde/throneteki,jbrz/throneteki,gryffon/ringteki,jbrz/throneteki,gryffon/ringteki