Adds `--hide-ui-dir-config` flag to disable editing directory configs from the web UI. This can be set to prevent users from setting the directory to somewhere they shouldn't, for public (or semi-public) interfaces.

Directories are still read from config.json, so the server admin can still set them in the web UI and then relaunch with the hide flag, or edit the config manually.

Also:
- fix OptionInfo `component_args` keyword argument not being read if `component` isn't also set
- ensure that hidden settings aren't still read from the web UI (otherwise they could still be changed by tampering with the interface)

fixed broken empty directory when prompt does not start withl etter

added new features to the list.

fix writing empty prompt pictures to rroot directory instead of 'empty'
suppress 'Denoising strength change factor' text inimage info unless using loopback mode

added a different workaround for gradio mask bug with info in UI
switched to newer gradio version

GFPGAN