* Move MarkdownPreviewHandler from WebBrowser to WebView2
* Disable context menu
Open links in default browser
* Update expect.txt
* Move SvgPreviewHandler from WebBrowser to WebView2
* Migrate SvgThumbnailProvider from WebBrowser to WebView2
* Migrate CustomControlTest to WebView2
Remove WebBrowser related stuff
* Update tests
* Revert GetThumbnail return value
Disable javascript dialogs in WebView2 for Svg thumbnail and preview
* expect.txt
* Increase timeout for Markdown tests
* Add sleeps
* Add zero check