[gnome-shell-extensions] (3 commits) Non-fast-forward update to branch wip/fmuellner/fix-windows-navigator

[Florian Müllner <fmuellner src gnome org>]

The branch 'wip/fmuellner/fix-windows-navigator' 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:

  e5a80bc... windowsNavigator: Use subclasses instead of injections
  dd26388... cleanup: Use an extension object instead of globals

Commits added to the branch:

  d94a350... README: Re-add extension alternate-tab with obsolescence no (*)
  a024d9f... windowsNavigator: Use subclasses instead of injections
  3671d5a... cleanup: Use an extension object instead of globals

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