Python: Load Python Script activity change the tooltip of the "File" property to mention the need to include a full file path

[andraciorici]

Environment
Python 1.2.6880.18459-alpha

Description
The new WorkingFolder property of Python Scope has this tooltip: "Used to specify the working folder of the scripts executing under the current scope."

Since the addition of this property, it would be useful to adapt the "File" property tooltip in "Load Python Script" to something like "Full path to python script file.".

This is because some people might mistakenly believe that since a WorkingFolder value was set in the Python Scope, they do not need to set the full path to the script file in the "Load Python Script" activity (which is wrong; the activity works the same, and it needs the full path to the file, just like before).