Don't do unnessecary things when the folder didn't change. This also avoids calling updateMessageList twice and losing the current selection.
Don't do unnessecary things when the folder didn't change. This also avoids
calling updateMessageList twice and losing the current selection.

svn path=/trunk/kdepim/; revision=348872

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