controls/Led: added opacity when disabled
controls/Led: added opacity when disabled

JDSquared/QtQuickVcp,JDSquared/QtQuickVcp,machinekoder/QtQuickVcp,strahlex/QtQuickVcp,bobvanderlinden/QtQuickVcp,qtquickvcp/QtQuickVcp,JDSquared/QtQuickVcp,araisrobo/QtQuickVcp,machinekoder/QtQuickVcp,bobvanderlinden/QtQuickVcp,strahlex/QtQuickVcp,JDSquared/QtQuickVcp,machinekoder/QtQuickVcp,araisrobo/QtQuickVcp,araisrobo/QtQuickVcp,qtquickvcp/QtQuickVcp,bobvanderlinden/QtQuickVcp,qtquickvcp/QtQuickVcp,strahlex/QtQuickVcp,araisrobo/QtQuickVcp,qtquickvcp/QtQuickVcp,machinekoder/QtQuickVcp