Stupid me: The inconsistent behavior between QListView::scrollTo() and QTreeView...

Stupid me: The inconsistent behavior between QListView::scrollTo() and QTreeView::scrollTo() has been fixed in Qt 4.5 :-) I should have tested this _before_ committing the huge patch for bug 185191... So:
* Remove the workaround in DolphinIconsView::scrollTo() to bypass an issue in Qt 4.4 (-> fixed in Qt 4.5)
* Revert the "use the DolphinController"-parts of commit 930754 and just use QAbstractItemView::scrollTo() instead.

CCBUG: 185191

svn path=/trunk/KDE/kdebase/apps/; revision=930777