When a user drags a service from the charm browser when viewing machine view they should be shown services view

Hi,

When a user is viewing machine view and drags a service from the charm browser towards the canvas area they currently cannot drop the service into machine view. This is because dragging the service is ambiguous, we don't know if the user wants 1 unit or a new service.

This problem is only around for the time being, the "added services" bar is just around the corner and this will solve the problem as the sidebar will only include services that are already in the canvas, this limits what the user can do. Since they will be dragging in an existing service we can say that they want 1 extra unit.

To solve the problem that we have now I propose that when a user picks up a service in the charm browser we hide machine view and show service view, the user drops the service on the canvas and the inspector is shown.