diable the copy button when zeroclipboard is broken
diable the copy button when zeroclipboard is broken

alejandrogarciasalas/classroom,tjhorner/classroom,chenwenbin928/classroom,jingruoruchu/classroom,BelieveC/classroom,jasnow/classroom,alejandrogarciasalas/classroom,alejandrogarciasalas/classroom,AlvarezAriel/classroom,AlvarezAriel/classroom,adoosii/classroom,BelieveC/classroom,AlvarezAriel/classroom,hackerkid/classroom,uqbar-project/classroom,mostlybadfly/classroom,adoosii/classroom,mkcode/classroom,sicipio/classroom,bhanuc/classroom,mkcode/classroom,kwangkim/classroom,hackerkid/classroom,tjhorner/classroom,kwangkim/classroom,adoosii/classroom,jasnow/classroom,guoyu07/classroom,chenwenbin928/classroom,nfeliciano/classroom,mostlybadfly/classroom,guoyu07/classroom,RyanTech/classroom,nfeliciano/classroom,kwangkim/classroom,BelieveC/classroom,chengjunjian/classroom,bhanuc/classroom,RyanTech/classroom,jasnow/classroom,guoyu07/classroom,mkcode/classroom,ConnorCartwright/classroom,ConnorCartwright/classroom,chengjunjian/classroom,jingruoruchu/classroom,jasonlong/classroom,bhanuc/classroom,uqbar-project/classroom,jingruoruchu/classroom,tjhorner/classroom,jasonlong/classroom,uqbar-project/classroom,sicipio/classroom,hackerkid/classroom,jasonlong/classroom,sicipio/classroom,chengjunjian/classroom,BelieveC/classroom,nfeliciano/classroom,mostlybadfly/classroom,ConnorCartwright/classroom,chenwenbin928/classroom,RyanTech/classroom