Only applied in a really few cases actually.
To reproduce:
* Open User Preferences *in own window*
* Search for node wrangler add-on (it's one of the few cases where this happens)
* Enable and open details
* Click on one of the menues in the add-on preferences
Actually this was reproducable in any window, user preference area just had to take up most/all of the width.
Note: I'm not totally sure if just disabling these lines is correct, but I didn't find any issues or any information why this was needed. So it seems to be redundant.
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