* Make sure loading indicator has enough vertical space
* Respect reduce_motion setting for loading indicator

Port 4ede51743e to glitch-soc

Display “load more” more consistently, add a loading indicator on first load.

(Even though that codepath is probably never actually used…)

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.

Inspired by b79ab15859

Port 3523aa440b to glitch-soc

Port 9a1a55ce52 to glitch-soc

Port 5131012505 to glitch