Filebrowser: minor changes

Some minor changes:
- Setting all tabs in Main to uncloseable
- Adding toggle pane and search field to navigation bar
- Unselect favorite in the favorites list, if the user browses to a different folder
- Set first favorite in the favorite list as default navigation path upon loading of a project
- moving all "getFileInformation" methods from FileListControl to LocalFile

Listeners that use a UI component should be added in the initialize method.