Add different models when using OpenAI for translation

[psmits1567]

Currently only one model is used when translating with OpenAI, it is GPT3 Turbo I believe
Now we have more models available, it would be great if a translator could choose between them (only official models)
It is up to the translator to decide if he/she wants to use a different model
The price per model for translation is different, but the outcome if GPT4 is used is much better
So I would like to be able to select GPT4.
Also a field that can be used to set a timeout for OpenAI would be very welcome
Sometimes translation is slow due to intensive traffic on the translation servers
That results in getting no answer, but with a timeout you can wait longer