Better validation for DataSelector file input

[Samuel Jackson]

The DataSelector widget should return an empty file name when getCurrentDataName() is called and there is not a valid file. Instead it will give you whatever text is in the box, regardless of if the file is valid.

To reproduce:

• Go to the IDA interface and select Fury.
• Open a file that is not in one of your managed directories as the input file
• Delete the path but keep the name
• Attempt to run fury. The file is not found, but the program still thinks it has a file name to use.

[Samuel Jackson]

Refs #7964 Updated DataSelector to fix file validation bug.

Also updated fury to properly validate the form.

Changeset: 8fc7919b844537bb0637c6683eab31b870c1e615

[Samuel Jackson]

To Tester

• Run the steps listed in the description using any valid input to Fury. You should now be presented with an error message telling you to correct the input of the file browser.

• Also check that the same is true when passing input from an empty workspace selector.

• Do a code inspection and check that the changes are reasonable.

[Michael Reuter]

There doesn't seem to be branch for this. The change looks like it was done straight on develop, which you shouldn't do. Please make one.

[Samuel Jackson]

Forgot to do a git publish on the local branch. 7964 should be a branch on github now.

[Nick Draper]

All looks good

[Nick Draper]

Merge remote-tracking branch 'origin/bugfix/7964_better_dataselector_validation'

[Stuart Campbell]

This ticket has been transferred to github issue ​8809