vue-storefront

#2076

@NataliaTepluhina please do add this to the docs:

Dynamic Categories prefetching (#2076)
Starting with Vue Storefront 1.7 we've added a configuration option `config.entities.category.categoriesDynamicPrefetch` (by default set to `true`). This option switches the way the category tree is being fetched. Previously we were fetching the full categories tree. In some cases it can generate even few MB of payload. Currently with this option in place we're pre-fetching the categories on demand while user is browsing the category tree