Improve layout for execution perspective. Improve default agent presentation. Restore check for Input value.
diff --git a/org.eclipse.amp.amf/plugins/org.eclipse.amp.amf.gen/src/metaabm/tmpl/edit.chk b/org.eclipse.amp.amf/plugins/org.eclipse.amp.amf.gen/src/metaabm/tmpl/edit.chk
index c2e7cfc..23adf36 100644
--- a/org.eclipse.amp.amf/plugins/org.eclipse.amp.amf.gen/src/metaabm/tmpl/edit.chk
+++ b/org.eclipse.amp.amf/plugins/org.eclipse.amp.amf.gen/src/metaabm/tmpl/edit.chk
@@ -43,8 +43,8 @@
 context AInput ERROR "Selection for " + usageLabel() + " is not in path": 

    sink.allSources.contains(selected);

    

-//context AInput ERROR "Input " + usageLabel() + " has no value": 

-//   value != null;

+context AInput ERROR "Input " + usageLabel() + " has no value": 

+   value != null;

    

 context AInput ERROR "Selection not specified for Input " + usageLabel(): 

    selected != null || literal != null;