Port d1b057a0ac to glitch-soc

Port 44a7d87cb1 to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

I don't like it changing files this way, but it's basically what
c49213f0ea and a few others did.

Port 839f893168 to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

Port part of be0bc9acbf and 7e244879fe
to glitch-soc

Port fd76955f39 to glitch-soc

* JS-linter: fix trailing comma's

* Configure eslinter to ignore this onchange error.

Signed-off-by: Thibaut Girka <thib@sitedethib.com>

Port b0323d0888 to glitch-soc

Signed-off-by: Thibaut Girka <thib@sitedethib.com>

Port 2dee293c4c to glitch-soc

Signed-off-by: Thibaut Girka <thib@sitedethib.com>

Port aa22b38fdb to glitch-soc

Signed-off-by: Thibaut Girka <thib@sitedethib.com>

Port 9683e1dcf8 to glitch-soc

Signed-off-by: Thibaut Girka <thib@sitedethib.com>

As this is what upstream does.

See also https://github.com/tc39/proposal-decorators/issues/69

Port 5129f6f2aa to glitch-soc

Signed-off-by: Thibaut Girka <thib@sitedethib.com>

Media modals push an history state so that pressing back on mobile closes them.
We made sure to not scroll when opening them, but not when *closing* them,
which caused some issues in rare cases.

Fixes #700