The game uses DXGI_FORMAT_R8G8B8A8_SNORM when building the D3D11
input-layout for what CW called Dec3N.
Updated XML import/export to correctly read these values.
When a drawable hash was unknown, it kept the "filename.#dd" name so
exporting to XML lost the hash and importing it back created a broken
file.
Now if the hash is unknown, the name is set to `hash_1234ABCD`, and XML
import checks for `hash_`.
`ShaderGroup.ShaderGroupBlocksSize` (aka `Unknown_30h`) contains the byte size divided by 16 of the ShaderGroup block and its children blocks, when they are packed contiguously in the resource file.
`DrawableBase.DrawableModelsBlocksSize` (aka `Unknown_9Ah`) is similar but with the size of the `DrawableModelsBlock`.
Incorrect values can cause crashes when the model is unloaded.
Discussed here https://discord.com/channels/329138547833700352/329142468102586368/1139264754767122533