Hammer pop-ups within VGUI dialogs don't accept mouse input

[ozxybox]

Describe the bug

VGUI pop-ups such as drop downs and message boxes within the keybind editor, model browser, and particle editor aren't taking mouse input. Instead the mouse input gets passed to the parent window.

To Reproduce

See related issues Keybind editor #1182 Model browser #87 Paricle browser #669

Issue Map

N/A

Expected Behavior

Input should be passed to the proper window instead of exclusively to the main window

Operating System

No response