We should get the Discord app working fully in LibWeb.

Here are some miscellaneous issues we need to fix for Discord compatibility. There are many more, so let's add them as we go.

• SubtleCrypto.generateKey() for the login screen QR codes
• SVG as image (<img src="some.svg">)
• History.pushState() and History.replaceState()
• contenteditable improvements for editing
• #17977
• SVG foreignObject
• SVG clipping & masking
• Element.scroll{Top,Height} attributes for scrolling the chat element to the bottom to actually show chat messages in channels with so many messages it doesn't load all of them at once. Otherwise, it shows the skeleton layout you see when you scroll up to load more messages.
• beforeinput event for contenteditable elements
• ImageData constructor with a typed array for displaying stickers