[fractal] (13 commits) Non-fast-forward update to branch clippy-ci

[Alexandre Franke <afranke src gnome org>]

The branch 'clippy-ci' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  01988d1... CI: use clippy for more tests

Commits added to the branch:

  b7d2076... Update Polish translation (*)
  9c01631... API: handle empty `next_batch` fields (*)
  6cf0575... Bump libhandy to 0.0.13 (*)
  546b3c8... main_window: Use the 'over' leaflet transition (*)
  97c1612... main_window: Allow swiping back when folded (*)
  b6d6e3b... Fix how to get the duration of audio/video (*)
  2fe58be... Fix temporary widget when sending attachments (*)
  830c469... Fix case handling when not finding file uri (*)
  455dd71... Improve fullscreen behavior of media viewer (*)
  74e17cb... Improve performance of find-visible algorithm (*)
  b0d130b... Fix: only auto-play videos, if Fractal is focused (*)
  01e90a1... Update Spanish translation (*)
  4822fef... CI: use clippy for more tests

(*) This commit already existed in another branch; no separate mail sent