[gtk+] (6 commits) Non-fast-forward update to branch wip/baedert/progressbar

[Timm Bäder <baedert src gnome org>]

The branch 'wip/baedert/progressbar' 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:

  79edd3a... progressbar: Use widgets for all subgadgets
  8100ce7... levelbar: Use widgets for all blocks
  142f791... widget-factory: Add dummy listbox placeholder
  122cc30... listbox: Properly remove placeholders
  e51c1c7... window: Make sure the decoration node stays at the beginnin
  73deab1... expander: Use widgets for title box and arrow

Commits added to the branch:

  b4d9565... progressbar: Use widgets for all subgadgets
  30209e8... levelbar: Use widgets for all blocks
  1a43f17... widget-factory: Add dummy listbox placeholder
  0cf7d35... listbox: Properly remove placeholders
  c466226... window: Make sure the decoration node stays at the beginnin
  e477ff5... expander: Use widgets for title box and arrow