[gtk] (11 commits) Non-fast-forward update to branch wip/matthiasc/gl-icon-cache

[Matthias Clasen <matthiasc src gnome org>]

The branch 'wip/matthiasc/gl-icon-cache' 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:

  d043ee1... gl renderer: Move texture atlas into its own file
  65792b6... glimage: Only support uploading one region
  1244426... gl renderer: Add & use icon cache
  0e99c8a... glyph cache: Clarify message
  585c7db... gl: Free icon data
  3044609... gl: Don't leak texture atlases
  c804bf1... glyph cache: Reinstate 1 pixel padding
  9ebeb1c... gl: Add 1 pixel of padding in the icon cache
  c1e30d1... gl: Allow setting min/mag filter on textures
  25d8ab8... gl: Use linear scaling for atlases
  457841e... gl: Use pad-extend for icon cache

Commits added to the branch:

  1494e8a... gl renderer: Move texture atlas into its own file
  d243fb4... glimage: Only support uploading one region
  58f17a9... gl renderer: Add & use icon cache
  697d3cb... glyph cache: Clarify message
  986eb79... gl: Free icon data
  ed5736d... gl: Don't leak texture atlases
  94e50b2... glyph cache: Reinstate 1 pixel padding
  94c4ebe... gl: Add 1 pixel of padding in the icon cache
  a238df9... gl: Allow setting min/mag filter on textures
  f04b7e1... gl: Use linear scaling for atlases
  d008eaa... gl: Use pad-extend for icon cache