Keyboard and focus issues with WebView2 and WinForms on .NET preview 7

Description

I've tried the latest WebView2 (SDK v1.0.955-prerelease, runtime v92.0.902.84) with Windows Forms on .NET v6.0.100-preview.7. I'm seeing a lot of improvements, but I still could spot the following issues:

• Alt+Space for system menu doesn't work when the focus is inside WebView2. OTOH, Alt+F4 does work as expected, I believe it didn't in early releases 👍.
• App-specific WinForms accelerators (e.g., Alt+X) still don't work when the focus is inside WebView2. They do when the focus is inside a native control like TextBox.
  Related WPF issue: https://github.com/MicrosoftEdge/WebView2Feedback/issues/468.
• Pressing and releasing Alt inside WebView2 activates WinForms menu, but the focus remains inside WebView2:
  

Version
WebView2 SDK v1.0.955-prerelease
WebView2 runtime v92.0.902.84
.NET v6.0.100-preview.7
Windows 10 v19043.1165

Repro Steps

• Install .NET 6.0.100-preview.7 SDK:
  https://dotnet.microsoft.com/download/dotnet/thank-you/sdk-6.0.100-preview.7-windows-x64-installer
• Clone the test repo:
  https://github.com/noseratio/WebView2WinFormsSysHotKeys .
• Run:
  dotnet run

AB#34280866

Clone the linked WebView2WinFormsSysHotKeys repository and run it with dotnet run using the versions listed in the issue. Reproduce Alt+Space, Alt+X, and Alt focus behavior inside WebView2, then inspect the sample entry point and related WinForms/WebView2 event handling. Done means the listed shortcuts and focus transitions behave as expected.