viewsettings dialog is now resizable and will remember its previous size across application runs. Each complete tab of the tabbook is now contained within a scrollWindow to allow access to all settings even on small screens refs #36

git-svn-id: http://svn.code.sf.net/p/sumo/code/trunk/sumo@16931 29f149b2-0c63-11e1-8f5c-a347f6a9acd0
Merge branch 'master' into planet