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

[Timm Bäder <baedert src gnome org>]

The branch 'wip/baedert/radial-gradient' 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:

  8c92b7b... gl renderer: Set an error if we don't have one already
  abe40f6... Inspector: Show radial gradient node info
  9aa13eb... rendernode: Pull local variable into closest scope
  3cc8a66... merge in error commit
  4f2d44c... gl renderer: Add radial gradient shader

Commits added to the branch:

  85c2428... gl renderer: Set an error if we don't have one already
  a8bfa57... Inspector: Show radial gradient node info
  4d6566e... rendernode: Pull local variable into closest scope
  5636dba... gl renderer: Add radial gradient shader
  b91931b... gl renderer: Consolidate color pre-multiplication