[Feature]: Add Flag to Suppress Fullscreen and Pointer Lock Prompts

Describe the feature/enhancement you need

The Fullscreen API and Pointer Lock API display prompts reminding users that they can press ESC to unlock cursor, exit Fullscreen etc. For our use case this is problematic and breaks immersion.

The scenario/use case where you would use this feature

We use the Construct 3 game engine to design 3D first person games that make use of the Fullscreen API and Pointer Lock API. The popups that appear when these methods are used are immersion breaking and ruin the appearance of a native app.

How important is this request to you?

Impactful. My app's user experience would be significantly compromised without it.

Suggested implementation

A simple flag, e.g. --disable-prompts would be invaluable to us.

What does your app do? Is there a pending deadline for this request?

Our app is a 3D first person game built using the Construct 3 engine. Countless other games built in the engine have this issue, and are stuck using NWjs (no longer supported by Construct) until this issue is resolved. We would like to move to WebView2, but this feature really is essential!

Linked discussion: #4050