fix(ListFilterForm): Fix FIlterBackendData to execute just before rendering (was done in constructor before a widget has been applied with setWidget())
fix(ListFilterForm): Fix FIlterBackendData to execute just before rendering (was done in constructor before a widget has been applied with setWidget())

SilbinaryWolf/silverstripe-mrfilter,SilbinaryWolf/silverstripe-mrfilter