On init UiMessageQueue should write the empty message string to the elem contents

[rob-murray]

When creating a new instance should we write that to the DOM immediately? Possibly an option to enable/disable this?

Given a valid DOM element id as an option When a new instance of UiMessageQueue is created Then the 'emptyQueueMessage' should be written to the DOM element

Given an invalid DOM element id as an option When a new instance of UiMessageQueue is created Then no Alert message should be displayed