Show and manage windows in workspaces for the Budgie Desktop

 This is part of a suite of python3 and Vala based applets for the Budgie
 Desktop that provide additional user orientated capabilities.
 The applets can be used individually or as a set.
 .
 The visualspace applet shows as a stylish compact workspace on the budgie
 panel. Choosing windows in the applet popup moves to the workspace
 where the window is located and gives it focus.
 The number of Workspace can also be changed though the applet popup.