[devhelp] (4 commits) Non-fast-forward update to branch wip/swilmet/misc

[Sébastien Wilmet <swilmet src gnome org>]

The branch 'wip/swilmet/misc' 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:

  41f3cf2... window: various small code improvements

Commits added to the branch:

  f648190... window: improve find_library_equivalent()
  9f72fd7... window: various small code improvements
  0740b58... window: remove redundant code with find_library_equivalent(
  5e785f4... window: simplify close_button_clicked_cb()