Fix "delete" and "move to trash" actions in dolphinpart; moved all logic for those...

Fix "delete" and "move to trash" actions in dolphinpart; moved all logic for those out of konqueror.
Inside dolphin, the usual: moving code to DolphinView.
Pressing shift while clicking on "Move to Trash" in konq (dolphinpart) offers to delete, as in kde3 (this bit of logic might be good for dolphin itself too? see DolphinPart::slotTrashActivated)
CCMAIL: peter.penz@gmx.at

svn path=/trunk/KDE/kdebase/apps/; revision=737682