Validation block to make validation microflows smaller

When validating entered content, you usually end up with creating a boolean valid variable, which will be set to false if the validation failed, followed by a validation feedback on the attribute.

Would be nice if we get one validation block:

Input:

• caption
• boolean variable which will be set to false when the validation fails
• text block where the validation takes place
• attribute for validation feedback
• feedback message to display

So using the example flow above, it would shrink in size from 13 to 4: