fix button: declare class button before return
fix button: declare class button before return

jefvel/lumX,jefvel/lumX,jefvel/lumX,hinablue/lumX,lumapps/lumX,jefvel/lumX,hinablue/lumX,lumapps/lumX,lumapps/lumX,lumapps/lumX,hinablue/lumX,hinablue/lumX