[gtk+] (5 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:

  4f3a80a... levelbar: Use widgets for all blocks
  2aa55d3... widget-factory: Add dummy listbox placeholder
  616926d... listbox: Properly remove placeholders

Commits added to the branch:

  96c3644... levelbar: Use widgets for all blocks
  20d8795... widget-factory: Add dummy listbox placeholder
  b17bb52... listbox: Properly remove placeholders
  0938662... window: Reorder decoration node to the beginning after addi
  03fab2e... expander: Use widgets for title box and arrow