Steps to reproduce:
1. Open new project with Unity
Version: 2021.1.0a6.1138.mobile/device-simulator/extensions.10
Revision: mobile/device-simulator/extensions 9ad2e44d36b3
Built: Sun, 08 Nov 2020 18:26:27 GMT

Or any version with Device Simulator in core already
2. Install Adaptive Performance 2.1 (AP and AP Samsung provider)
3. Select the Simulator from the dropdown in the Game view
4. Open the Control panel and expand a few of the Adaptive Performance items
5. Resize the window to a smaller one
6. Notice how the elements start climbing on top of eachother or getting shrunk

Expected: Reducing the window size should put the elements in a scroll area and a vertical/horizontal bar should appear
Actual: All elements are squished together based on the window size

Reproduced on:
Version: 2021.1.0a6.1138.mobile/device-simulator/extensions.10
Revision: mobile/device-simulator/extensions 9ad2e44d36b3
Built: Sun, 08 Nov 2020 18:26:27 GMT