0.9.3claws34

0.9.3claws34

* src/Makefile.am
* src/account.c
* src/folder.[ch]
* src/folder_item_prefs.[ch]            ** NEW **
* src/folderview.c
* src/mainwindow.c
* src/mh.c
* src/prefs_gtk.c
* src/prefs_scoring.c
* src/summaryview.c
* src/prefs_folder_item.[ch]
        o seperate FolderItemPrefs (formerly PrefsFolderItem) and the
          Properties dialog
        o use prefswindow for folder properties

* src/gtk/prefswindow.[ch]
        change implementation to use an invisible notebook instead
        of unparenting widgets