[TUP-2205] NPException while right clicking a job
bug TDI-30301 fixed : Studio will throw endless of "Unhandled event loop
exception"
about the deleted file, more information please see :
https://jira.talendforge.org/browse/TUP-1628
Merge branch 'maintenance/5.6' into bugfix/5.6/TUP-2192_haveSingleBuildProperties