Bug 316298 [Compatibility] Support o.e.ui.menus visibleWhen
We need support in MCoreExpression for entire expressions created by the WorkbenchMenuService. They don't often use ReferenceExpressions to core expression definitions. PW
bundles/org.eclipse.e4.ui.workbench/src/org/eclipse/e4/ui/workbench/UIEvents.java
public static final String TOPIC = UITopicBase + "/commands/Command"; 
		public static final String COMMANDNAME = "commandName"; 
		public static final String DESCRIPTION = "description"; 
		public static final String PARAMETERS = "parameters"; 
	}
	public static interface CommandParameter {
		public static final String TOPIC = UITopicBase + "/commands/CommandParameter"; 
		public static final String NAME = "name"; 
		public static final String OPTIONAL = "optional"; 
		public static final String TYPEID = "typeId"; 
	}
	public static interface Handler {
		public static final String TOPIC = UITopicBase + "/commands/Handler"; 
		public static final String COMMAND = "command"; 
	}
	public static interface HandlerContainer {
		public static final String TOPIC = UITopicBase + "/commands/HandlerContainer"; 
		public static final String HANDLERS = "handlers"; 
	}
	public static interface KeyBinding {
		public static final String TOPIC = UITopicBase + "/commands/KeyBinding"; 
		public static final String COMMAND = "command"; 
		public static final String PARAMETERS = "parameters"; 
	}
	public static interface KeySequence {
		public static final String TOPIC = UITopicBase + "/commands/KeySequence"; 
		public static final String KEYSEQUENCE = "keySequence"; 
	}
	public static interface Parameter {