FieldSearchCompleterPopup does not repaint it's position when resizing the UI Builder Window

Steps to reproduce:

1. Open any Project
2. Create a UIDocument Asset in the Project Browser and open it in UI Builder
3. Create a Style Sheet and a Selector in it and select the Selector
4. Click the Kebab Menu next to any Style and select "Set variable"
5. Resize the UI Builder Window and observe the popup

Actual results: FieldSearchCompleterPopup does not update it's position until a key down event is triggered, clicking Ctrl or Shift or any other key

Expected results: The popup updates it's position when the UI Builder Window is resized or is closed when the UI Builder window is manipulated as it's closed when anything else is clicked inside the UI Builder Window

Reproducible with versions: 6000.3.15f1, 6000.4.6f1, 6000.5.0b7, 6000.6.0a4

Can’t test with versions: 6000.0.74f1 (No Variables in selector)

Tested on (OS): Windows 11