Add a "Select All" button in the Explore Hiearchy view by Jason Wang

Currently there is no good way in the UI to move a large amount of members from under one consolidated member to another. Excel add-on does not deal with hierarchies, and not every user has direct access to the backend database staging tables, so we're left with the Silverlight UI.
There are two problems here:
1. In the tree view, the search function is not powerful enough. The "filter" function in the entity view would be much better.
2. Even if I can locate all the members I need to move in the tree view, I have to select them one by one before I can cut them. It's *a lot of* clicks. A "select all" button will make my life so much easier.