Added missing arg() which was leading to "%1 Folder is read-only" in the statusbar.
Added missing arg() which was leading to "%1 Folder is read-only" in the statusbar.

svn path=/trunk/kdepim/; revision=306504

lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi