Double clicking on the drag bar to maximize does not update the maximize button icon, the icon remains the same, by contrast, if you click the maximize button the icon does update.

Environment

Windows 10 19H1
Windows Terminal version (if applicable): master

Any other software?

Steps to reproduce

1. Start Windows Terminal in normal state
2. Double click the drag bar to maximize the window.

Expected behavior

The maximize button icon is updated

Actual behavior

The maximize button icon does not update.

We are not listening from window state change events from the top level window into the mixmaxclose user control.