diff --git a/src/app/shared/form/builder/ds-dynamic-form-ui/models/dynamic-group/dynamic-group.components.ts b/src/app/shared/form/builder/ds-dynamic-form-ui/models/dynamic-group/dynamic-group.components.ts
index 6662f7e24b..7ad62ce479 100644
--- a/src/app/shared/form/builder/ds-dynamic-form-ui/models/dynamic-group/dynamic-group.components.ts
+++ b/src/app/shared/form/builder/ds-dynamic-form-ui/models/dynamic-group/dynamic-group.components.ts
@@ -81,7 +81,7 @@ export class DsDynamicGroupComponent implements OnDestroy, OnInit {
 
     this.formId = this.formService.getUniqueId(this.model.id);
     this.formModel = this.formBuilderService.modelFromConfiguration(config, this.model.scopeUUID, {});
-    this.chips = new Chips(this.model.value, 'value', this.model.mandatoryField, this.EnvConfig.submission.metadata.icons);
+    this.chips = new Chips(this.model.value, 'value', this.model.mandatoryField);
     this.subs.push(
       this.chips.chipsItems
         .subscribe((subItems: any[]) => {
diff --git a/src/app/shared/form/builder/models/form-field-metadata-value.model.ts b/src/app/shared/form/builder/models/form-field-metadata-value.model.ts
index ebcdc9264c..542e5d029e 100644
--- a/src/app/shared/form/builder/models/form-field-metadata-value.model.ts
+++ b/src/app/shared/form/builder/models/form-field-metadata-value.model.ts
@@ -1,4 +1,4 @@
-import { isNotEmpty } from '../../../empty.util';
+import { isNotEmpty, isNotNull } from '../../../empty.util';
 
 export class FormFieldMetadataValueObject {
   metadata?: string;
diff --git a/src/app/shared/notifications/models/notification-type.ts b/src/app/shared/notifications/models/notification-type.ts
index 8ef5d790b5..935129943e 100644
--- a/src/app/shared/notifications/models/notification-type.ts
+++ b/src/app/shared/notifications/models/notification-type.ts
@@ -2,6 +2,5 @@ export enum NotificationType {
   Success = 'alert-success',
   Error = 'alert-danger',
   Info = 'alert-info',
-  Warning = 'alert-warning',
-  // Bare = 'bare'
+  Warning = 'alert-warning'
 }
diff --git a/src/app/shared/object.util.ts b/src/app/shared/object.util.ts
new file mode 100644
index 0000000000..50680d6d32
--- /dev/null
+++ b/src/app/shared/object.util.ts
@@ -0,0 +1,52 @@
+import { isNotEmpty } from './empty.util';
+import { isEqual, isObject, transform } from 'lodash';
+
+/**
+ * Returns passed object without specified property
+ */
+export function deleteProperty(object, key): object {
+  const {[key]: deletedKey, ...otherKeys} = object;
+  return otherKeys;
+}
+
+/**
+ * Returns true if the passed value is null or undefined.
+ * hasNoValue();              // true
+ * hasNoValue(null);          // true
+ * hasNoValue(undefined);     // true
+ * hasNoValue('');            // false
+ * hasNoValue({});            // false
+ * hasNoValue([]);            // false
+ * hasNoValue(function() {}); // false
+ */
+export function isObjectEmpty(obj: any): boolean {
+  const objectType = typeof obj;
+  if (objectType === 'object') {
+    if (Object.keys(obj).length === 0) {
+      return true;
+    } else {
+      let result = true;
+      for (const key in obj) {
+        if (isNotEmpty(obj[key])) {
+          result = false;
+          break;
+        }
+      }
+      return result;
+    }
+  }
+}
+
+export function difference(object, base) {
+  const changes = (o, b) => {
+    return transform(o, (result, value, key) => {
+      if (!isEqual(value, b[key]) && isNotEmpty(value)) {
+        const resultValue = (isObject(value) && isObject(b[key])) ? changes(value, b[key]) : value;
+        if (!isObjectEmpty(resultValue)) {
+          result[key] = resultValue;
+        }
+      }
+    });
+  };
+  return changes(object, base);
+}