[Kde-imaging] Small UI changes for the batch dialog

[Aurelien Gateau]

> I'm agree with all points excepted the Help links that provides a find way
> to go to on kipi handbook anchor in the future (where we can add some
> explainations about)

I agree that a help button is usefull in most KIPI dialogs, but this one 
closes itself automatically, so I'm not sure it's very handy: the dialog may  
closes itself too fast for the user to clic on the help button.

Aurélien