* Add popover for informing user about the connected status indicator
* Ensure user only sees connected status info popover once
* Default connectedStatusPopoverHasBeenShown to true and set it to false in a migration
* Add unit test for migration 42
* Initialize AppStateController if it does not exist in migration 42
* Update connect indicator popup locale text
* Code cleanup for connected-indicator-info-popup
* Code cleanup for connected-indicator-info-popup
There were two existing cases where a footer was added to a popover by
putting it in the popover contents. This has been refactored to place
the footer in the popover instead, so that styles common to all
popover footers could be shared.
The popover now has a `section` element instead, giving the `header`
and `footer` elements a correct section context.
The height of the popover is now set to a maximum of 94% of the
viewport height, rather than a static height of 564px. This setting
ensures that the popover has a maximum height of exactly 564px in the
popup, which matches the designs. However it is now able to shrink or
grow to accommodate larger viewports or smaller popovers.
* Add minimal working popover
* Fix styling of popover component
* Use lorem ipsum
* Update classnames and remove unrelated styles
* Remove unused components
* Add SVG close icon
* Add Close icon to icon stories
* Use div
* Use `addon-actions`
* Use `<button>` for close
* Fix button wobble in Firefox
* Remove border
