added ctrl+up or ctrl+down hotkeys for attention

- Attention, specify parts of text that the model should pay more attention to

    - a man in a ((tuxedo)) - will pay more attention to tuxedo

    - a man in a (tuxedo:1.21) - alternative syntax

    - select text and press ctrl+up or ctrl+down to aduotmatically adjust attention to selected text

- Loopback, run img2img processing multiple times

- X/Y plot, a way to draw a 2 dimensional plot of images with different parameters

- Textual Inversion

- Reloading checkpoints on the fly

- Checkpoint Merger, a tab that allows you to merge two checkpoints into one

- [Custom scripts](https://github.com/AUTOMATIC1111/stable-diffusion-webui/wiki/Custom-Scripts) with many extensions from community

- [Composable-Diffusion](https://energy-based-model.github.io/Compositional-Visual-Generation-with-Composable-Diffusion-Models/), a way to use multiple prompts at once

     - separate prompts using uppercase `AND`

     - also supports weights for prompts: `a cat :1.2 AND a dog AND a penguin :2.2`

## Installation and Running

Make sure the required [dependencies](https://github.com/AUTOMATIC1111/stable-diffusion-webui/wiki/Dependencies) are met and follow the instructions available for both [NVidia](https://github.com/AUTOMATIC1111/stable-diffusion-webui/wiki/Install-and-Run-on-NVidia-GPUs) (recommended) and [AMD](https://github.com/AUTOMATIC1111/stable-diffusion-webui/wiki/Install-and-Run-on-AMD-GPUs) GPUs.

addEventListener('keydown', (event) => {

	let target = event.originalTarget;

	if (!target.hasAttribute("placeholder")) return;

	if (!target.placeholder.toLowerCase().includes("prompt")) return;

	let plus = "ArrowUp"

	let minus = "ArrowDown"

	if (event.key != plus && event.key != minus) return;

	selectionStart = target.selectionStart;

	selectionEnd = target.selectionEnd;

	if(selectionStart == selectionEnd) return;

	event.preventDefault();

	if (selectionStart == 0 || target.value[selectionStart - 1] != "(") {

		target.value = target.value.slice(0, selectionStart) +

			"(" + target.value.slice(selectionStart, selectionEnd) + ":1.0)" +

			target.value.slice(selectionEnd);

		target.focus();

		target.selectionStart = selectionStart + 1;

		target.selectionEnd = selectionEnd + 1;

	} else {

		end = target.value.slice(selectionEnd + 1).indexOf(")") + 1;

		weight = parseFloat(target.value.slice(selectionEnd + 1, selectionEnd + 1 + end));

		if (event.key == minus) weight -= 0.1;

		if (event.key == plus) weight += 0.1;

		weight = parseFloat(weight.toPrecision(12));

		target.value = target.value.slice(0, selectionEnd + 1) +

			weight +

			target.value.slice(selectionEnd + 1 + end - 1);

		target.focus();

		target.selectionStart = selectionStart;

		target.selectionEnd = selectionEnd;

	}

});