[GB.WEB.GUI]
* NEW: Key.Code returns the name of the pressed key, while Key.Text now returns the text associated with the key if there is.
* NEW: Key.Shortcut returns the shortcut string associated with a keyboard event.
* BUG: Fix Key.Control property.
* NEW: Handle WebMenu.Shortcut property.
* BUG: Use 'keydown' DOM event instead of 'keypress', as 'keypress' is deprecated.
* NEW: Setting WebTextArea.Text now automatically moves the cursor and the scrollbar to the end of the text.