Save filter state in readonly mode between sort modes.

Doesn't seem to work correctly with row filters for some reason.


git-svn-id: svn+ssh://svnrepo/projects/nitpick/trunk@6056 561c3618-0fe6-0310-b5d6-fc65c73fee30
Use the session filter settings when traversing back to the index in readonly
mode.


git-svn-id: svn+ssh://svnrepo/projects/nitpick/trunk@6057 561c3618-0fe6-0310-b5d6-fc65c73fee30
Factor out common function configuration.


git-svn-id: svn+ssh://svnrepo/projects/nitpick/trunk@6058 561c3618-0fe6-0310-b5d6-fc65c73fee30
Fix filter saving between reloads for the readonly view.


git-svn-id: svn+ssh://svnrepo/projects/nitpick/trunk@6059 561c3618-0fe6-0310-b5d6-fc65c73fee30