subversion integration 'Show History' for packages

hi, when marking a folder in Project-Viewer i cannot see the Subversion option to show history and more important a compare from a package. when going to a file i can choose this.

how is it possible to see subversion history/compare by folder (this should be possible because subversion is versioning folders)? i think this feature very important (as done by subclipse eclipse plugin), to grasp changes on package or project level.

thanks for any hints.