'View All' link on home page is hardcoded and breaks for non-root deployments

Describe the bug When setting LABEL_STUDIO_HOST to a value that isn't on domain root (e.g. http://ls.example.com/subdomain), the 'View All' (projects) link shows a modal with an error.

https://github.com/HumanSignal/label-studio/blob/347408c799939a2a13a7ed422739998aea79d016/web/apps/labelstudio/src/pages/Home/HomePage.tsx#L173

Should probably use absoluteURL.