PathFilterUI : Account for `roots` when dragging and dropping paths
PathFilterUI : Account for `roots` when dragging and dropping paths

We want to add paths that are relative to the roots.

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