Need to better document the need to use custom mouse handling for selection in the QML views

It would be good to make it very clear that developers need to implement their own mouse handling for setting a view's current item (and how this interacts with highlightRangeMode?).

This information might make sense at one or both of the following locations:

• http://doc.qt.nokia.com/4.7-snapshot/qml-listview.html
• http://doc.qt.nokia.com/4.7-snapshot/qml-views.html