Filters do not take Panel scaling into account

Steps to reproduce:

1. Create a UI Toolkit panel with intricate details (e.g. text)
2. Set a pass-through filter (e.g. opacity to 100%)
3. Display on a monitor with a 2x DPI
4. Toggle the filter on and off

Similar cases to be fixed:

• PanelSettings Scale
• PanelSettings Scale Mode (e.g. Scale with Screen Size)

Actual results: 

UI looks blurry when the filter is on

Expected results: 

UI looks the same with the filter and without it

Reproducible with versions: 6000.3.x 6000.4.x

Can’t test with versions: 6000.2 and previous