Errors in checkout stack into multiple orders per submit

Current behavior

The more times you submit an order with invalid data (i.e. only numbers in the name fields) the more times there will be a submit order request sent to the backend. First submit will send only one request, another submit w/o fixing errors will send the order twice, etc.

Expected behavior

Order requests having error are being repeated over and over.

Steps to reproduce the issue

1. try to place an order with invalid user data (i.e. a few digits in name fields)
2. hit submit button several times
3. the more times you hit the button the more requests will be sent to the backend incrementally.

Can you handle fixing this bug by yourself?

• YES but not anytime soon, feel free to fix it
• NO

Which Release Cycle state this refers to? Info for developer.

Pick one option.

• This is a bug report for test version on https://test.storefrontcloud.io - In this case Developer should create branch from develop branch and create Pull Request 2. Feature / Improvement back to develop.
• This is a bug report for current Release Candidate version on https://next.storefrontcloud.io - In this case Developer should create branch from release branch and create Pull Request 3. Stabilisation fix back to release.
• This is a bug report for current Stable version on https://demo.storefrontcloud.io and should be placed in next stable version hotfix - In this case Developer should create branch from hotfix or master branch and create Pull Request 4. Hotfix back to hotfix.

Environment details

• Browser: Chrome 72
• OS: Ubuntu 18.04
• Node: 8
• Code Version: develop

[pkarw]

I belive we should do both: changing error statuses inside Vue-storefront-api. Add general workaround - hotifx to not queue orders in case of http error other than 200 (we should use the queue only for network outage / offline mode - in this case there is no http error at all rather there we have a fetch exception)

[lukeromanowicz]

I believe that #2753 would help a lot in this case.