[gtk+] (5 commits) Non-fast-forward update to branch wip/baedert/gl

[Timm Bäder <baedert src gnome org>]

The branch 'wip/baedert/gl' 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:

  af4498a... gl renderer: Remove superflous modelview matrix changes
  40e504b... gl renderer: Default to GL_LINEAR scaling filters
  d76ef08... gl renderer: Avoid using a new modelview for shadow nodes
  acd00d1... gl renderer: Keep track of border program state
  1d8bf94... gl renderer: Sort border sides by color

Commits added to the branch:

  7603eb1... gl renderer: Remove superflous modelview matrix changes
  e17c8b9... gl renderer: Default to GL_LINEAR scaling filters
  9f0dbf0... gl renderer: Avoid using a new modelview for shadow nodes
  f4f5028... gl renderer: Keep track of border program state
  a072ff6... gl renderer: Sort border sides by color