Feature: add file/folder pickers for items which require a path to a folder or file.

[EddieGreen]

Running the beta version, 4.0.13.0 when testing validation using scripts that were working in release 4.0.12 produces an error:

[EddieGreen]

Further to this, appears that I double pasted one of the script paths. Removed double entry and application runs as expected. Any chance of getting a file picker on these entries?