C1RichTextBox Hyperlinks
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Shows how to support hyperlinks in a C1RichTextBox.

The C1RichTextBox parses hyperlinks defined in HTML ("a" tags).

When the user clicks a link, the C1RichTextBox fires a RequestNavigate event. The 
application can handle the click (by opening a new browser instance and navigating 
to the link for example), or it can ignore it.

When the mouse hovers over a link, the C1RichTextBox also fires ElementMouseEnter
and ElementMouseLeave events so the application can update the UI (for example 
telling users to click or control-click the link in order to follow it).

