Fix breadcrumb homepage link in cms static pages

[andrzejewsky]

Related issues

closes #3631

Which environment this relates to

• Test version (https://test.storefrontcloud.io) - this is a new feature or improvement for Vue Storefront. I've created branch from develop branch and want to merge it back to develop
• RC version (https://next.storefrontcloud.io) - this is a stabilisation fix for Release Candidate of Vue Storefront. I've created branch from release branch and want to merge it back to release
• Stable version (https://demo.storefrontcloud.io) - this is an important fix for current stable version. I've created branch from hotfix or master branch and want to merge it back to hotfix

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

Contribution and currently important rules acceptance

• I read and followed contribution rules

[pkarw]

price fields got renamed to price_incl_tax and so on

[andrzejewsky]

@pkarw done

[pkarw]

Thanks for me its fine however we need to have a @filrak or @patzick view on this

[patzick]

I think we should get rid of breadcrumbs module eventually because it's not necessary, so I'm not giving here notes about direct access to breadcrumbs state, not thru getters :)
However, it looks good for me, tested it locally and everything works; good job!