Copy the C++ improvements made from upstream

[fire]

trafficstars

https://github.com/V-Sekai/qodot/tree/4.0

[codecat]

Can you be more specific on these changes? Would these at all be relevant to TBLoader, which generally has a different base?

[fire]

Yes. These are C++ changes.

For example:

vs

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Need to check if all the changes are merged.