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.
Bumped version to 0.98.0 and updated Changes file.
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.