Updated ControlsFX to 8.20.8
Updated ControlsFX to 8.20.8

Updated ControlsFX to 8.20.8 in order to make it compatible with Java
8u25. This build should still be backwards compatible with Java 8u20,
but requires at least that version.

CIRDLES/Topsoil,emilycoleman/Topsoil,emilycoleman/Topsoil,johnzeringue/Topsoil,johnzeringue/Topsoil,CIRDLES/Topsoil