[ADF-4546] Visibility conditions for Form variables don't work on Multiline Widget. (#4786)

* * Finding variable values by id & used date format

* * Tests to validate visibility by using id

* * [ADF-4529] Refactor conditions

* [ADF-4529] Fixed cloud form editor script error

lib/core/mock/form/widget-visibility.service.mock.ts

@@ -93,5 +93,25 @@ export let fakeFormJson = {
                 ]
             }
         }
+    ],
+    variables: [
+        {
+            'id': 'e621e8ff-42a6-499c-8121-33c7c35d8641',
+            'name': 'age',
+            'type': 'integer',
+            'value': 11
+        },
+        {
+            'id': '4f8aa99e-8526-429c-9d99-809978489d96',
+            'name': 'name',
+            'type': 'string',
+            'value': 'abc'
+        },
+        {
+            'id': '0207b649-ff07-4f3a-a589-d10afa507b9b',
+            'name': 'dob',
+            'type': 'date',
+            'value': '2019-05-13'
+        }
     ]
 };