Add a notice to install a browser extension like Stylus to be able to install styles about userstyles.world

[Gusted]

@vednoc As we discussed ;). Should be good-to-go.

[vednoc]

I thought this was about something else. How can we tell if an extension is already installed?

[Gusted]

How can we tell if an extension is already installed?

🤷🏽 possible have within stylus a little code to remove that banner.

[vednoc]

That's what I was thinking. We could also add an option to hide the button in USw Tweaks userstyle.

[Gusted]

Sounds good

[Gusted]

It is implemented and if you have stylus installed, from the next stylus update on it will remove the notice.

[vednoc]

For posterity, it was added in 2875bc3 and I forgot to reference the issue in the commit.