Rule States in Rule Flow
To make it easier to work with rules in Rule Flow, the rules have colored borders.
The purple border has a rule if it is in a neutral state - it has no warnings or errors.
If the user works with the rule, ie has it clicked and sees its sidebar, the rule changes color to green.
If a rule has a warning, it will be demarcated a yellow border and an icon
will appear next to it.
Errors are serious mistakes that prevent Rule Flow from being saved. A red border and an icon
appear next to a rule that contains errors.