- `/sdapi/v1/options` GET now calls `get_config()` from **sysinfo** module, instead of from its own version of the function.
- Defined a new, flexible and more robust `set_config()` function in **sysinfo** module, which:
- obsoletes redundant code
- skips updating values that are unchanged
- has flexible args for both API and UI use
- `/sdapi/v1/options` POST and `override_settings` now use the new `set_config()` function. `set_config()` could possibly obsolete additional functions, but I'm not going to get into that just yet.
- Options for `forge_additional_modules` can now be provided either as the file path, or just the module name.
- Most importantly, `refresh_model_loading_parameters()` is now only called ONCE per request, and **only** if necessary.
- It is now much easier to call `shared.opts.save()` as needed
