bugfix - #4132, #4133, #4136, #4138, #4139, #4140

[gibkigonzo]

Related Issues

closes #4132, #4133, #4136, #4138, #4139, #4140

Short Description and Why It's Useful

• added comments in 'productsEqual' and change logic for different type of products
• remove login user after order
• allow changing qty for 'group' and 'bundle' products

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

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

[patzick]

everything looks good, nice work! :)