SVN commit 13393 by tcberner: Add upstream commit to fix not being able to add a new panel or set a wallpaper.
Obtained from: https://cgit.kde.org/plasma-workspace.git/commit/?id=bfb91f9de153d53a30d82ad6ce0d6732da4ab367 M +1 -0 Makefile AM files/patch-git_fb91f9
