EdiConditionAttribute. New functionality as well as an extensibility point.
Allow EdiConditionAttribute to stack that will then be checked with the OR
logical operator. Added new functionality as well as an extensibility point for the condition attribute.
new features include
1. Condition attribute stacking.
2. Condition check for multiple values
3. "CheckFor" toggle that switches between equal/Notequal check
Also now the condition attribute can be extended.