Online demo: Input/SDL/other problems

[LekKit]

• Buttons HID_KEY_MINUS and HID_KEY_EQUAL aren't reported, even tho native SDL build works fine
• Any way to lazy load the FS image? Downloading entire rootfs at page load seems wasteful. Tried using synchronous XHR, but it seems overly complicated and not supported well in Emscripten.
• No way to use touch keyboard on Android, etc. Needs help from JS side.
• Host cursor is visible (Minor nuisance for proper cursor integration)
• When in fullscreen, input isn't working at all
• Temporary mouse/keyboard lockups (Perhaps I2C HID related?)

[LekKit]

HID lockups fixed by 44fcc7b

[LekKit]

Lazy image loading is blocked on a missing Emscripten feature, and should be done on their side. WASMFS project will hopefully bring this functionality soon.