fix(deployment): disable feed deployment if no versions exist

Author: landonreed

lib/manager/components/version/FeedVersionNavigator.js

@@ -171,7 +171,8 @@ export default class FeedVersionNavigator extends Component {
                 <ButtonGroup>
                   {isModuleEnabled('deployment') && !isPublic
                     ? <Button
-                      disabled={disabled} // || !feedSource.latestValidation}
+                      // Disable deployment if not permitted or no version exists
+                      disabled={disabled || !hasVersions}
                       onClick={this._createDeployment}>
                       <Icon type='globe' /> Deploy feed
                     </Button>