File Selected on Click instead of download.

Instead of a particular file to be downloaded by clicking anywhere in the row, which is sort of buggy as there is a download button as well, it selects the file, which in my opinion should be the ideal behavior.
We discussed this here : https://github.com/owncloud/core/issues/202
@DeepDiver1975 @jancborchardt @owncloud/designers @karlitschek