fix for current route and disable request if it is cached

[gibkigonzo]

Short Description and Why It's Useful

Two changes:

• in asyncData we can have prevoius route in rootState.route. Thats because asyncData is triggered before we enter route and before 'vuex-router-sync' can be updated. So this change adds getter 'url/getCurrentRoute' which has always newest route data, because it is updated before asyncData in client-entry and server-entry.
• in 'core/lib/search.ts' we get data from cache but still request is triggered. So in this change if we have request in cache, then we don't trigger request.

Screenshots of Visual Changes before/after (if There Are Any)

Cached requests before:

Cached requests after:

Which Environment This Relates To

Check your case. In case of any doubts please read about Release Cycle

• 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 Vue Storefront sites with this new feature

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

Contribution and Currently Important Rules Acceptance

• I read and followed contribution rules

[andrzejewsky]

@gibkigonzo changelog 💂

[gibkigonzo]

@andrzejewsky done :)