update to development version 2.6.3

git-svn-id: http://svn.code.sf.net/p/texstudio/code@4125 92cce386-e96d-4106-809f-596c673a3fd8
- new framework titledpanel for panels in the main window
- applied titledpanel to outputView and improved log display therein

git-svn-id: http://svn.code.sf.net/p/texstudio/code@4126 92cce386-e96d-4106-809f-596c673a3fd8