[Edit] Add policy to restrict views in Edit mode

Add policy to disallow views in Edit mode which have been
explicitly flagged as non-editable, WTD-1062.

platform/commonUI/edit/src/policies/EditableViewPolicy.js

@@ -0,0 +1,36 @@
+/*global define*/
+
+define(
+    [],
+    function () {
+        "use strict";
+
+        /**
+         * Policy controlling which views should be visible in Edit mode.
+         * @constructor
+         */
+        function EditableViewPolicy() {
+            return {
+                /**
+                 * Check whether or not a given action is allowed by this
+                 * policy.
+                 * @param {Action} action the action
+                 * @param domainObject the domain object which will be viewed
+                 * @returns {boolean} true if not disallowed
+                 */
+                allow: function (view, domainObject) {
+                    // If a view is flagged as non-editable, only allow it
+                    // while we're not in Edit mode.
+                    if ((view || {}).editable === false) {
+                        return !domainObject.hasCapability('editor');
+                    }
+
+                    // Like all policies, allow by default.
+                    return true;
+                }
+            };
+        }
+
+        return EditableViewPolicy;
+    }
+);