Refined-github: `minimize-user-comment` breaks hidden comments

[fregante]

1. Visit https://github.com/sindresorhus/refined-github/pull/2146
2. My first comment is hidden, but minimize-user-comment opens it

Gif of me reloading the page. It shows the hidden comment being unhidden by the feature:

cc @notlmn

[fregante]

The current hijacking of the GitHub's hidden comments also causes the "Unhide" menu item to appear in comments that the feature hid and viceversa:

I think we should move away from these:

https://github.com/sindresorhus/refined-github/blob/7db0c217842e3eb05a38aefd97743b7f0ea9963e/source/features/minimize-user-comments.tsx#L30-L32

and just hide the comments with [hidden] and our own UI (a simple icon placed by the username, for example):

// Pseudo code used for the gif
$('.timeline-comment-header').addEventListener('click', 
    e => event.currentTarget.nextElementSibling.toggleAttribute('hidden')
)

[notlmn]

It ain't a feature implemented by me if it ain't broke.

---

hide the comments with [hidden] and our own UI (a simple icon placed by the username

That makes sense, will try to whip up something in the meanwhile using https://octicons.github.com/icon/eye/ for the icon.

[fregante]

We all write bugs 😃

[fregante]

I think this icon would make more sense as a muted/ignored/minimized status, but we need more of a toggle, so perhaps a simple chevron-right should work. On the left of the username