Added Destroyed and MatchReady properties to CareerUnit.
Career mode squad editor removes any non MatchReady units from your squad on enable.
Career mode squad editor units can no longer be dragged into the squad if they're not MatchReady.
Removed the red border lerping for durability in career mode squad editor, replaced with white for MatchReady, red for not.
Pressing D in career mode (unity) reduces all your units durabilities by 10