When validating a form in a multi tab dialog where a field has an error, no message is displayed to the user (only appears in the tab which contains the form field).

1. Open 'Contacts' app
2. Edit a contact
3. Go to the 3rd tab and delete the value of the required field email
4. Go back to 1st tab and clic on 'Save changes' button
5. No hint that an error occurred is displayed in 1st tab
6. Move to the 3rd tab again and the field email is highlighted in red

Expected: an error message is displayed to the user in the current tab.

Check the attached file 'No error hint.png' as an example of step 5 and 'Tab with error.png' to see an example of step 6.