Don't overwrite header values with identity specific values (e. g. when editting a message). For some reason blocking signals didn't work. Therefore we do it now the ugly way, disconnecting and connecting the appropriate signal.
Don't overwrite header values with identity specific values (e. g. when editting a message). For some reason blocking signals didn't work. Therefore we do it now the ugly way, disconnecting and connecting the appropriate signal.

svn path=/trunk/kdenetwork/kmail/; revision=180434

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