WindowGlass (Split): Window margin issue

While using **Windows 11 Taskbar Styler** there is a styling issue. The current opened window margin cross the space given to contain it. And it takes away that flawlessness from the application.

<img width="1920" height="443" alt="Image" src="https://github.com/user-attachments/assets/b7481f0a-fc38-416c-b00b-b96315d8aeb4" />

Theme author: @Nathaniel4JC 