Business benefit: Validate field input before saving. Avoids errors in data and content.
- Validation bubbles should appear below invalid "top-level" fields
- SUPPORT-9784 - Validation error and Askerisk shoud display for Requried Richtext Field
Hint: reuse Validation extension currently living in ui-test-webapp (as developed/ported from DEV-441-
Vaadin8 binding mechanism has server side API for this
- also apply to "top-level" fields within the new UI framework (sub-fields to be addressed by MGNLUI-4555)