Quick addition to the node sidebar "Active Node" panel: draw input socket values in addition to non-socket settings. This makes it possible to actually use the sidebar for all node settings without
having to go to the main area for changing socket values.

This patch should be considered a temporary solution. The Active Node panel is a horrible mess and needs to be split up and cleaned. It should probably be moved to python as well.

git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@57089 954f8c5b-7b00-dc11-b283-0030488c597c