allow jpeg for extra network preview

add a bit of spacing/styling to settings elements
add link info for token merging

Integrate optional speed and memory improvements by token merging (via dbolya/tomesd)

Add/modify CFG callbacks for Self-Attention Guidance extension

Bump some versions to avoid downgrading them

Required by self-attn guidance extension
https://github.com/ashen-sensored/sd_webui_SAG

Allow web UI to be ran fully offline

Allow bf16 in safe unpickler

never refer to lora by an alias if multiple loras have same alias or the alias is called none

Allow bf16 in safe unpickler

Localization fixes

Allow web UI to be ran fully offline

Refs https://github.com/AUTOMATIC1111/stable-diffusion-webui/pull/9955#issuecomment-1546587143

Allows web UI to (almost) be ran fully offline.
The web UI will hang on load if offline when
these fonts are not manually defined, as it will attempt (and fail)
to pull from Google Fonts.

This request is sent regardless of Gradio analytics being
enabled or not via the env var.
Idea from text-generation-webui.

launch.py: fix git_tag() & fix commit_hash() & simplify