WDR format differs in WDD

[spicybung]

gtaDrawables seem to differ when they're in a gtaDictionary. To that degree, the ModelCollection section is missing in gtaDrawables that come from dictionaries, so this means several more pointers to the Model section, instead. Furthermore, we must account for the adjusted offset for a gtaDrawable in a gtaDictionary when we slice them into buffers - as well as the physical size - at certain points.

So:

Adjust for missing ModelCollection section by removing it's reading logic for dictionary WDRs, and add logic directing pointers to the Model section instead, while adjusting for offsets in our sliced buffer.