Show whether or not the Rule Engine is in use on the Overview tab
Get rules from Rule Engine
Also support old rule system
Ability to edit rule conditions
Allow condition editing only on pages where rule engine is used
Changed the icon to a Duke's coronet
Merge pull request #1 from ktkiiski/fea_rule_engine_support

Rule engine support
Merge pull request #2 from ktkiiski/fea_extension_icon

Extension icon