[Context] Add test, tweak logic

Add test to verify that warnings are not shown based on
composition/location inconsistencies when editing.

platform/core/src/services/Contextualize.js

@@ -68,7 +68,7 @@ define(
                 // Don't validate while editing; consistency is not
                 // necessarily expected due to unsaved changes.
                 var editor = domainObject.getCapability('editor');
-                if (editor && !editor.inEditContext()) {
+                if (!editor || !editor.inEditContext()) {
                     validate(domainObject.getId(), parentObject);
                 }