Saving Textual Inversion settings - also save initialization text

[quasiblob]

Most of the settings are already saved to settings.json when training in started.

It would be very nice to also have "Initialization text" saved, as "number of vectors per token" too is saved.

[BlastedRemnants]

I was just coming here to make the same suggestion, so I'll just give this a bump instead. This would be a great feature, if someone knows how could you please add it?