Describe the bug
Currently it shows "Maximize" tooltip regardless of window is maximized or not

However the correct tooltip should be "Restore down" when the window is maximized, see any normal win32 window and uwp window

Steps to reproduce the bug
n/a
Expected behavior
No response
Screenshots
No response
NuGet package version
WinUI 3 - Windows App SDK 1.6.6: 1.6.250228001
Windows version
Windows 10 (20H2): Build 19042
Additional context
Related: #2229. Does this project actually have QA?