Added Current Dispatcher dropdown to DispatcherWindow.

Removed the acquire window per dispatcher mechanism, and the currentDispatcher method. There is now one global DispatcherWindow and a selection menu for the registered dispatchers.
Removed "Current" from label and added spacing.
Registered LocalDispatcher as "Local"

Removed questionable camel casing in DispatcherWindow.
Merge pull request #891 from andrewkaufman/currentDispatcher

Added Current Dispatcher dropdown to DispatcherWindow.