Updated txt2img screenshot (UI as of Oct 9th) for github webui / README.md

* add updateOnBackgroundChange
* typo fixes.
* reindent to 4 spaces

Fixes #1049

When using the 'Sampler' or 'Checkpoint' options, if one of the entered
names has a typo, an error will only be thrown once the `draw_xy_grid`
loop reaches that name. This can waste a lot of time for large grids
with a typo near the end of a list, since the script needs to start over
and re-generate any earlier images to finish making the grid.

Also fixing typo in variable name in `draw_xy_grid`.

This reverts commit e2930f98.

Added DeepDanbooru interrogator

support EMA weights in processing (????)

Otherwise, we may override it with one of the next two path (. or ..) if it is present there, and then the local paths of other modules (taming transformers, codeformers, etc.) wont be found in sd_path/../.

Fix https://github.com/AUTOMATIC1111/stable-diffusion-webui/issues/1085