Allow a user to choose to permanently update their desired replicas for their deployment

When scaling, we should provide an option to a user who is scaling their deployment to update the deploymentconfig desired replias setting. Currently, if you scale the deployment in the explorer view or the replicationcontroller in the tabs view, image or config change triggers from a DC will set the replica count to whats defined their. Suggest:

• Adding a custom dialog in the "..to.." option
• Update to use a spinner
• Add a checkbox to 'make the change perminent'
• If checkbox=true, you should only need to update the dc if it has a configchange trigger.
• Optionally show checkbox if unable to determine the dc associated with the deployment.