Refactor Console Notification service to include httpError() to have a single place where we format an http response into the message for notification and logging.

Also modified DefaultResourceErrorResponse to set the message to cause.getMessage() if a message is not passed to constructor. This provides a nicer looking message for UI.
Console: Loaders refactoring
LIVEOAK-128 More collection page functionality
Merge pull request #124 from vrockai/LIVEOAK-128_4

More functionality on collection page
Fix storage port validation and hide spinners.