Merge pull request #204 from pcpiela/master

Small fix associated with recent refactoring
Fix a problem in which zero width slices were occupying the entire pie
Dont change the size of an item when selecting it
Modifications to the cluster view. Move the metric selector and sort menu down to the host chooser so that they are in close proximity to the view that they control. Cleanup the host chooser. Several fixes for the Show Hosts None summary view.
Merge remote branch 'upstream/master'