fix issue with duplicate nodes in UI (Case:50777)
fix issue with duplicate nodes in UI (Case:50777)

unnecessary extra reloadUI call would result in duplicate nodes being
created for any that occured after 400 milliseconds after calling it
because loadXForm() calls resetFormDesigner() which resets the UI and
then reloadUI(), after 500 milliseconds.

esoergel/Vellum,johnhbenetech/Vellum,mwhite/Vellum,mwhite/Vellum,johnhbenetech/Vellum,johnhbenetech/Vellum,johnhbenetech/Vellum