fix: replicate missing `cv-` classes from Vue2 repo

[OlkaB]

Contributes to #1581

 What did you do?

Replicated missing cv- classes that were present on the components in Vue2

 Why did you do it?

To minimise amount of changes we need to do when migrating to Vue3

How have you tested it?

run updated tests

Were docs updated if needed?

• [x] N/A
• [ ] No
• [ ] Yes