* Mock up an “API response object” for the inbox notices
* Add in a fake “loading” delay
* Add placeholder mixin from Calypso
* Add a placeholder ActivityCard and styles
* Merge exports of placeholder into ActivityCard
* Add tests for placeholder card
* Update readme
* Switch placeholder content prop to a line count, rather than specific children
* Update tests for new lines prop
* Clear timeout when the inbox unmounts
* Add a test for 0 lines
* ActivityCard: Update to match new activity panel designs
* Add spacing rhythm system, add the rest of the base colors
* Add styles for the ActivityCard
* Use the new ActivityCard in the orders panel
* Update text color & size
* Disable timestamped test (string changes based on date)
* Use moment to generate a relative timestamp to match “3 days ago” snapshot
* Rename spacing vars
The difference between gap and gap-med is not intuitive, so let’s switch to -small, and change -small to -smallest.