AltTester popup move issues connected to screen aspect ratio

## Steps to reproduce

1. Open the SampleScenes game in Unity
2. In Unity Editor in _Game_ set the `Free Aspect` ratio (random size)
3. Start the game with `Play in Editor` from the AltTester Editor Window
4. Try to move the AltTester popup as far on the left and up the screen
5. Stretch the game window to the right from the left border (when the popup is on the right) and down from the upper border (when the popup is up) and check if the popup is visible

## Actual result

### AR

- On step 4 the popup cannot be moved to the left and up borders of the screen
- On step 5 the popup disappears from the screen

### Additional info

Environment
- Unity for Windows/MacOS v 2021.3.16f1
- AltTester Unity SDK from `development` branch (30.01.23)

Screen recording for both steps 4 and 5 AR
https://user-images.githubusercontent.com/62327834/215516016-8cb199d1-3fc0-4afa-b89d-bbc72c1aaf98.mp4

Screenshot for the situation when the popup is moved as far as possible to the left

Screenshot for the situation when the window is stretched to the right and the popup was on the left

Other notes
- Issues found when testing #1080

## Expected result

### ER

- On step 4 the popup can be moved to the left and up borders of the screen
- On step 5 the popup does not disappear from the screen