fix a bug preventing normal operation if a string is added to a gr.Number component via ui-config.json

face restoration and tiling moved to settings - use "Options in main UI" setting if you want them back

rework hires fix UI to use accordion
prevent bogus progress output in console when calculating hires fix dimensions

remove the progressbar for extension installation in favor of logging output

split shared.py into multiple files; should resolve all circular reference import errors related to shared.py

pass samplers from UI by name, make it possible to use a sampler from infotext even if it's hidden in the dropdown

add CFG denoiser implementation for DDIM, PLMS and UniPC (this is the commit when you can run both old and new implementations to compare them)