Respect global single/double click setting for the icons- and details view (thanks to Sam Abed for the patch!). PS: I did not introduce an executed()-signal in KListView, as:

* In general we want to avoid having Kxxx-view classes for existing Qxxx-view classes like this was the case in KDE3. Qt4 allows us to use custom models + delegates and hence there should be no need to introduce KListView, KTreeView or KColumnView.

* It looks like KListView will be renamed to KCategoryView and it's open yet whether it it will be available outside the scope of a file manager for KDE 4.0.

* The details view is derived from QTreeView and the columns view is derived from QColumnView -> adjusting KListView won't help here :-)