3508 fixed comparison list preservation

[vue-kacper]

closes #3508

Short description and why it's useful

Comparison list is now preserved between page refresh action

Upgrade Notes and Changelog

• No upgrade steps required (100% backward compatibility and no breaking changes)
• I've updated the Upgrade notes and Changelog on how to port existing VS sites with this new feature

IMPORTANT NOTICE - Remember to update CHANGELOG.md with description of your change

Contribution and currently important rules acceptance

• [x ] I read and followed contribution rules
• [x ] I read the TypeScript Action Plan and adjusted my PR according to it
• I read about Vue Storefront Modules and I am aware that every new feature should be a module

[pkarw]

thanks, small change suggested