I'm 99% sure the "Track" button is hard coded to close the window. I know that in some cases, like the tinkered harvestable tracker, the usage of track is limited and so having the window remain up might invalidate that limitation.
You might try othesus's suggestion of adding a show window command to the track button.
As for editing it and messing things up -- at worst you'll just screw up that window (and at very worst, cause it to crash you). So long as you revert the edits things will return to normal.
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