Inconsistencies between editor and kev script commands

[cdiehl]

1- Editor allows to create 2 nodes with the same name
kev script does not allow it.
output message of script execution is Node Already existe, Interpreter Result : true

2- Editor allows to create 2 channels with the same name
kev script does not allow it:
output message of script execution is Channel already exist on, Interpreter Result : false

[gnain]

The behavior has been corrected.