TODO:

1. Write a new selection system. Godot's built-in RichTextLabel selection is limited by the node's boundaries. In normal web, holding click and dragging your mouse across the screen will select text across multiple nodes. Godot doesn't have a "set_selected_text" property, despite having one for "get_selected_text".
2. Right-click Dropdown for basic text operations (Copy, Paste, Cut). Download options for images
3. Select-all CTRL+A shortcut
4. Scrolling in the website container
5. Store tab containers so switching tabs won't erase previous tab.
6. GIF support
7. Video support via GDE GoZen
8. More input types (url, tel, date, time, etc.)
9. Required attribute for inputs

Issues:

1. < br /> counts as 1 element in WebsiteContainer, therefore despite being (0,0) in size, it counts as double in spacing.