First step for making the details view usable again:

First step for making the details view usable again:
- accept drops
- Automatically resize the columns in a way that the whole available width is used by stretching the width of the 'Name' column. Qt4's QTreeView really rocks, only a few lines of code had been necessary to get this behavior :-)

svn path=/trunk/playground/utils/dolphin/; revision=627189