Start selection mode with single mouse click...

Double clicking an item opens it.
BandSelectManager tells MultiSelectManager where its selection begins
    so Shift+Click behavior can be complimentary.
BandSelectManager more actively manages selection...so it doesn't
    clear existing selection on mouse down.

Change-Id: Ibe65e793e84463d333a19f363dfb0d42c37480e3
5 files changed