Avoid initial notifications

Wait until the next fetch, that way the connection has a chance to bump
the activity and avoid a "this workspace will shut down" message that
immediately becomes incorrect.

Closes #383.

src/workspaceMonitor.ts

@@ -79,7 +79,6 @@ export class WorkspaceMonitor implements vscode.Disposable {
     this.statusBarItem = statusBarItem
 
     this.update(workspace) // Set initial state.
-    this.maybeNotify(workspace)
   }
 
   /**