[Vue] reset dom element state in fields before update:modelValue #19259

Description:

…so parent component can decide if change should go through. I meant for this change to be in #19236, but I guess I forgot to push it.

Changes:

• Make sure DOM state is reset for fields that need it before emitting update:modelValue, so parent components can ignore the change if they want.

Review

• [ ] Functional review done
• [ ] Potential edge cases thought about (behavior of the code with strange input, with strange internal state or possible interactions with other Matomo subsystems)
• [ ] Usability review done (is anything maybe unclear or think about anything that would cause people to reach out to support)
• [ ] Security review done
• [ ] Wording review done
• [ ] Code review done
• [ ] Tests were added if useful/possible
• [ ] Reviewed for breaking changes
• [ ] Developer changelog updated if needed
• [ ] Documentation added if needed
• [ ] Existing documentation updated if needed