Sensitive content filter

[anton202]

Fixes

Related to WordPress/openverse#636 by @panchovm

Description

This PR creates a Toggle switch and a new senesetive content filter

Checklist

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  Update index.md).
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  errors.

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[zackkrida]

This is phenomenal work! I love the new toggle component.

One thing we will need to fix, however, is accessibility. We need some focus styles for the toggle. Right now I can't tell if it can be switched using the keyboard or not.

@panchovm do you know if we have focus styles for this toggle yet? This may be blocked by that design work if not.

Thanks so much @anton202.

[anton202]

@zackkrida @olga thank you for your comments and changes and thx for correcting my english in evrey PR :)))
i`ll commit zack`s chaanges on sunday.
regarding accessibility, never really addreessed accessibility stuff before. so as you mentioned, i`ll add the ability to switch the toggle button using the keyboard.
regading the focus style, of course if @panchovm have an answear for it that will be great, but any way i`ll check in the design library that i took this switch toggle from (i think it was from wordpress design library)

[fcoveram]

The toggle element used in Openverse is the one from the WordPress Design Library. So please use that one and replace the focus color with openverse pink.

I also noticed that this ticket addresses a component change. Not sure if it covers the toggle element but worth checking its scope. In any case, we need to follow the last version of WordPress' toggle component.