Don't append an signature when switching identity and the user doesn't want to append signatures automatically.
Don't append an signature when switching identity and the user doesn't want to
append signatures automatically.

svn path=/trunk/kdenetwork/kmail/; revision=71921

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