NoduleLayout : Avoid repeat construction of regex
NoduleLayout : Avoid repeat construction of regex

This had sufficient overhead that it showed up in profiles, and removing it lead to around a 6% reduction in GraphGadget construction time for large graphs.

hradec/gaffer,GafferHQ/gaffer,boberfly/gaffer,hradec/gaffer,GafferHQ/gaffer,ImageEngine/gaffer,johnhaddon/gaffer,ImageEngine/gaffer,boberfly/gaffer,andrewkaufman/gaffer,andrewkaufman/gaffer,johnhaddon/gaffer,johnhaddon/gaffer,hradec/gaffer,GafferHQ/gaffer,andrewkaufman/gaffer,andrewkaufman/gaffer,hradec/gaffer,ImageEngine/gaffer,hradec/gaffer,boberfly/gaffer,johnhaddon/gaffer,johnhaddon/gaffer,andrewkaufman/gaffer,ImageEngine/gaffer,GafferHQ/gaffer,GafferHQ/gaffer,boberfly/gaffer