feat(rxStatus): attr edit for success/error banners; Resolves #420

Addresses issue #420, adding timeout and repeat=false attributes to success banners and a repeat=false attribute to error attributes. Once this is merged in, I will need to delete `status.js` and `status.spec.js` from encore-cloud-ui and remove the import of `status.js` from encore-cloud-ui's `index.html`.
@klamping @ErnieAtLYD I think the 5 seconds as a default will work, but it will change the behavior in Dedicated vCenter which relies on the message not disappearing.

We should have it configurable via { timeoutInterval: } in the options I think, but I don't know which should be the default. 5 or -1. If Cloud is the biggest consumer and that app requires the messages to disappear; then I suppose I can update vCenter to make them stick around with a -1.