[epiphany] (16 commits) Non-fast-forward update to branch mcatanzaro/user-style

[Michael Catanzaro <mcatanzaro src gnome org>]

The branch 'mcatanzaro/user-style' 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:

  0e89be7... embed-prefs: improve safety of style sheet monitor

Commits added to the branch:

  7b6d20a... embed-shell: use cancellable where required (*)
  d947d74... web-process-extension: add cancellable and use it where req (*)
  471892f... web-view: use a cancellable where required (*)
  46af096... flatpak-utils: use cancellables where required (*)
  2596422... snapshot-service: use cancellable, or ref, where required (*)
  1d519fc... window-commands: use cancellables where required (*)
  e2a199e... window-commands: remove Google+ from hardcoded web app name (*)
  9140276... CI: suppress cppcheck unreadVariable warning (*)
  0e8d958... Remove unused popup manager implementation (*)
  7f9b4ec... Remove obsolete do-not-track setting (*)
  8440b35... Remove enable-webgl and enable-webaudio settings (*)
  ba5cb81... Remove enable-plugins setting (*)
  496a3be... Redesign downloads arrow (*)
  7ce8f08... web-view: rearrange (*)
  033a65e... web-view: avoid unnecessary g_signal_connect() (*)
  4634d83... embed-prefs: improve safety of style sheet monitor

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