Show a warning when the index of a folder has to be regenerated
Show a warning when the index of a folder has to be regenerated

svn path=/trunk/kdenetwork/kmail/; revision=178154

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