ZoomIt - prevent closing when opening another app

### Microsoft PowerToys version

0.97.1

### Installation method

GitHub

### Area(s) with issue?

ZoomIt

### Steps to reproduce

Open ZoomIt > Draw mode
Open another app with a keyboard shortcut (assigned by ahk).
The app takes control.

Please add an option to keep ZoomIt on top.

### ✔️ Expected Behavior

To keep ZoomIt on top.

### ❌ Actual Behavior

ZoomIt Draw mode closes.

### Additional Information

Win 10 22H2 x64
ZoomIt x64

### Other Software

_No response_

Start with the ZoomIt Draw mode entry point and reproduce the behavior on Windows 10 22H2 by opening another app through a keyboard shortcut. Done means an option exists to keep ZoomIt on top and Draw mode does not close when the other app takes control.

Written by the indexing model from the issue text.