—such as combo-box.

We started using a mixin to include input styles arbitrarily into various Vaadin component's Sass mixins; still the border styles and font-styles are applied to the same DOM element, whereas in the select case part of goes to a parent div of the input element.

This should be fairly easy to parameterize the mixin and remove some style duplication while ensuring better consistency with interaction changes (hover/focus/validation-errors).

Acceptance criteria:

• Hover/focus states are not active for readonly fields (e.g. in Message details app)
• Invalid ComboBox looks consistent (grey background, border)