Feature request: ease translation work by removing text content from CSS

[dashdashzako]

Hello!

There is a few text content set inside the CSS file, which makes it difficult to localize unless a specific CSS rule is set for the language.

cupper/themes/cupper/static/css/styles.css

Lines 238 to 244 in afefa0d

	[for="themer"] [aria-hidden]::before {
	content: 'off';
	}
	[for="themer"] :checked + [aria-hidden]::before {
	content: 'on';
	}

cupper/themes/cupper/static/css/styles.css

Lines 525 to 529 in afefa0d

	figcaption::before {
	counter-increment: fig;
	content: 'Figure ' counter(fig) ':\0020';
	font-weight: bold;
	}

I think adding adding this information to HTML files and keep CSS declaration as language-free as possible would make translation work much easier and cleaner.

Cheers!