Prepending the Grails "--offline" flag in Run/Debug target causes test window to not appear

Occasionally we need to run functional tests in Grails offline mode. if I have a Run target with a command line like this:

–offline test-app functional: -echoOut -https

It causes IntelliJ to not display the test runner UI, but instead just echos out the test execution/results to the console.

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*Imported from [IDEA-173349](https://youtrack.jetbrains.com/issue/IDEA-173349) · Type: Bug · Votes: 0*
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Reproduce the issue from an IntelliJ Run/Debug target using “–offline test-app functional: -echoOut -https” and observe whether results appear in the test runner UI or only in the console. Trace the Run/Debug target and Grails functional-test execution path; done means offline execution still opens the test runner while preserving the reported test output.

Written by the indexing model from the issue text.