UI for GDSN Metric Family
As a user, I want to have UI piece to edit available metric units within GDSN family, so that I may add/remove new units.
Note: Metric Units are being stored in measures.yml file, and not in the database. They are being processed asynchronously **once **the create attribute tab is being fired up (that means it's not heavy lifiting for the browser). But that basically makes it impossible or at least hard at first to create CRUD interface for managing them, as they are hard-coded.
(Describe additional criteria that must be met for the User Story to be complete)