Allow TI training using 6GB VRAM when xformers is available

Add PNG info to pngs only if option is enabled.

Caused error in latest pytorch-lightning==1.8.0

make save dir if save dir is not exists

Correct before image saved callback

add some more classes to safety module for an extension

Unload sd_model before loading the other to solve the issue #3449

feat: add app started callback

Certain step counts for DDIM cause out of bounds error

Localization Italian - Updates and additions

Removed "Peso dei bordi del punto focale" duplicated string from "Focal point edges weight"

Deleted it_IT localization file outside localization folder as it was not intentionally committed

Added translations of the new Extensions tab, and a few corrections to some previously translated descriptions/terms.

Add Extension Manager strings

Since it's fixed and working I'm updating the translations

fix broken Restart Gradio button

when unloading vae during TI training, generating images after
training will error out

Merge branch 'master' of https://github.com/AUTOMATIC1111/stable-diffusion-webui into TI_optimizations

Added some extension KR support

Supported extensions
https://github.com/adieyal/sd-dynamic-prompts
https://github.com/yfszzx/stable-diffusion-webui-images-browser
https://github.com/DominikDoom/a1111-sd-webui-tagcomplete
https://github.com/lilly1987/AI-WEBUI-scripts-Random

option to use xattention optimizations when training
option to unload vae when training

I've updated a few terms and descriptions. Waiting for review and, hopefully, approval.

Added KR support for Dynamic Prompts extension - https://github.com/mkco5162/sd-dynamic-prompts

Added KR support for Dynamic Prompts extension  - https://github.com/mkco5162/sd-dynamic-prompts

not sure if this available...