Reduce peak memory usage when changing models

added save image button and a hotkey to Modal Image View

Add german Localization file.

Included localization file for IT language

Revamped Arabic localization

Add localisation for Traditional Chinese 正體中文化

Natural sorting for dropdown checkpoint list

Fix log off by 1 #3847

Fixed proper dataset shuffling

Added option to use unmasked conditioning image for inpainting model.

Extras Tab - Option to upscale before face fix, caching improvements

Adding pt_BR (portuguese - Brazil) to localizations folder

Filename tags are wrongly referencing to process size instead of image size

Add missing support for linear activation in hypernetwork

Disable unavailable or duplicate options for Activation functions

[API][Feature] Add extras endpoints

Filename tags [height] and [width] are wrongly referencing to process size instead of resulting image size. Making all upscale files named wrongly.

This changes the extras image cache into a Least-Recently-Used
cache. This allows more experimentation with different upscalers
without missing the cache.

Max cache size is increased to 5 and is cleared on source image
update.

Bit of a refactor to the image cache to make it easier to extend.
Also takes into account the entire image instead of just a cropped portion.

Face restoration can look much better if ran after upscaling, as it
allows the restoration to fix upscaling artifacts. This patch adds
an option to choose which order to run upscaling/face fixing in.