[Qt5-feedback] Moving itemmodels to QtCore

[Stephen Kelly]

Iván Todorovich wrote:

> QItemModel shold be in QtCore.. 

This is a typo. QItemModel does not exist. Which class do you mean?

> but QItemSelectionModel shouldn't since
> selection only makes sense in QtGui

Not true. It makes sense in QtDeclarative too. It doesn't belong in a gui 
library. It's more abstract than that. It's just a selection. Not a 
visualization of a selection. The view does the visualization.