Always open contents pane in initially, unless there is no outline and the user has chosen so in the prefs.
Always open contents pane in initially, unless there is no outline and the user has chosen so in the prefs.

git-svn-id: cb3fc60f0f557b927b8032d8a94e869b6f9f230b@2961 0fceea05-a30d-0410-8a8b-80ef821fb0a1

jasongrout/skim,camillobruni/skim,jasongrout/skim,camillobruni/skim,camillobruni/skim,camillobruni/skim