Improved graphEditor error handling when files are dropped.
Improved graphEditor error handling when files are dropped.

ivoflipse/devide,nagyistoce/devide,nagyistoce/devide,fvpolpeta/devide,chrisidefix/devide,zhangfangyan/devide,chrisidefix/devide,zhangfangyan/devide,ivoflipse/devide,fvpolpeta/devide