[PDI-11848] - Creating dynamic tabs before size is calculated, validating that user selected to substitute variable if they are using an existing script and the fifo name is randomized
Merge pull request #18 from brosander/PDI-11848-dialog

[PDI-11848] - Creating dynamic tabs before size is calculated, validating that user selected to substitute variable if they are using an existing script and the fifo name is randomized