Story 45579797: Changed format of meeting popup to only have one datepicker
Story 45985159: Amended document model (server side) to null out pop sample references when the associated document is deleted
Story 45465479: Unknown user name or email punched into user field now shows add user popup; plus button is now hidden, but necessary to still exist in the DOM to pop up the popup.
Population sample number fields no longer showing null
Merge remote-tracking branch 'github/canary' into develop