WinForms - Hot keys are being swallowed, for example: System.Windows.Forms.Keys.LaunchApplication2

- **What version of the product are you using?**
- I'm running CefSharp.WinForms.Example from master branch commit 1155ef107c0d7464feec5c0db0ed90bbddccad64.
- This example is pulling NuGet packages:
- cef.redist.x64 79.1.31
- cef.resdit.x86 79.1.31
- I can reproduce with many other version of CefSharp (75, 73, etc.)

- **What architecture x86 or x64?**
- x86 and x64

- **On what operating system?**
- Windows 10

- **Are you using `WinForms`, `WPF` or `OffScreen`?**
- WinForms

- **What steps will reproduce the problem?**
1. Launch the [CefSharp.WinForms.Example](https://github.com/cefsharp/CefSharp/tree/master/CefSharp.WinForms.Example)
2. Press the Calculator, Browser Home or Launch Mail keys. Not every keyboard has hot keys, but the [Natural Ergonomic Keyboard 4000](https://www.microsoft.com/accessories/en-us/products/keyboards/natural-ergonomic-keyboard-4000/b2m-00012) is an example of a keyboard that has these keys.
3. Notice that the calculator, the default browser or the default email reader are not launched.
4. Change to a non-CefSharp application and press these keys again. Calculator, default browser and default email reader are launched.

- **What is the expected output? What do you see instead?**
- CefSharp should NOT swallow these keys.

- **Please provide any additional information below.**
- No logs related using `settings.LogSeverity = LogSeverity.Verbose`

- **Does this problem also occur in the `CEF` Sample Application from http://opensource.spotify.com/cefbuilds/index.html?**
- To compare with WinForms run cefclient --multi-threaded-message-loop
- The issues does not reproduces with `cef_binary_79.1.31+gfc9ef34+chromium-79.0.3945.117_windows64_client.tar.bz2`

Beginne damit, das Verhalten der Tasten Calculator, Browser Home und Launch Mail in CefSharp.WinForms.Example unter Windows 10 nachzustellen, und vergleiche es anschließend mit cefclient unter Verwendung der multi-threaded message loop. Als abgeschlossen gilt, wenn diese Tasten im WinForms-Beispiel nicht länger verschluckt werden und die zugehörigen Windows-Anwendungen starten.

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