Resize functionality for test view

[registerspoint]

Closes #3680
This addresses a usability issue within the testing framework's user interface. Previously, users encountered difficulties when viewing test information due to a layout that did not support customization. The test details were fixed on the side of the page with limited resizing options.

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[kdashg]

Thanks for the submission!
Unfortunately it's hard to review the important changes when the diff is dominated by formatting changes.
So that we can review it better, let's do formatting changes in a separate PR from the functional changes you're proposing here!