[gnome-shell] (11 commits) Non-fast-forward update to branch wip/chergert/3-28-perf-fixes

[Christian Hergert <chergert src gnome org>]

The branch 'wip/chergert/3-28-perf-fixes' 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:

  6c7ebec... ShellAppCache: add cache to help keep I/O off main thread
  9a7cb50... appDisplay: use ShellAppCache to translate folder names
  94d82ef... appDisplay: use ShellAppCache to access GAppInfo
  166a8fb... shell-global: Make saving of persistent state asynchronous
  cfdb07d... global: force fsync() to worker thread when saving state
  7db3479... ShellAppSystem: use ShellAppCache to access GAppInfo

Commits added to the branch:

  2c549bf... ShellAppCache: add cache to help keep I/O off main thread (*)
  f87b9f3... appDisplay: use ShellAppCache to translate folder names (*)
  cfb92ad... appDisplay: use ShellAppCache to access GAppInfo (*)
  4e22989... Revert "appDisplay: use ShellAppCache to access GAppInfo" (*)
  2040c38... Revert "appDisplay: use ShellAppCache to translate folder n (*)
  5ccf92e... Revert "ShellAppCache: add cache to help keep I/O off main  (*)
  b48e95c... Revert "util: cache local GTimeZone" (*)
  e5460b5... ShellAppCache: add cache to help keep I/O off main thread
  4d678c8... shell-global: Make saving of persistent state asynchronous
  88f4668... global: force fsync() to worker thread when saving state
  b5b65c3... ShellAppSystem: use ShellAppCache to access GAppInfo

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