Bug: Main hammer view not auto selecting when moving the mouse from tool windows

[KrazyZark69]

Describe the bug

When a smaller tool window is open for example the texture or entity property windows, moving the mouse to the main viewport doesn't auto select hammer unless you actually click the window which can cause annoying disruptions if you accidentally drag the whole window, it seems like a regression from stock hammer, which could do this.

To Reproduce

open a tool window and hover over the main viewport and witness it not selecting it

https://github.com/user-attachments/assets/c0af3f2e-4005-401a-bb96-44ef7392c958

Issue Map

just have any map open, its a hammer ui bug

Expected Behavior

main viewport should auto select as soon as the mouse leaves the smaller tool windows

https://github.com/user-attachments/assets/5e080167-0b16-42f6-b7d4-d9cb963ed235

Operating System

Windows 10