Show current tab in URL
Show current tab in URL

This way it is possible to link to a specific part of the documentation,
not just the list. The whole page is in the history only once, so if
user goes from API root to a resource and clicks all tabs there, a
single click on back button will bring them back to API root.

JIRA: PDC-1011

product-definition-center/product-definition-center,xychu/product-definition-center,product-definition-center/product-definition-center,product-definition-center/product-definition-center,puiterwijk/product-definition-center,pombredanne/product-definition-center,release-engineering/product-definition-center,release-engineering/product-definition-center,xychu/product-definition-center,pombredanne/product-definition-center,puiterwijk/product-definition-center,puiterwijk/product-definition-center,release-engineering/product-definition-center,xychu/product-definition-center,tzhaoredhat/automation,pombredanne/product-definition-center,product-definition-center/product-definition-center,lao605/product-definition-center,lao605/product-definition-center,tzhaoredhat/automation,tzhaoredhat/automation,tzhaoredhat/automation,lao605/product-definition-center,pombredanne/product-definition-center,lao605/product-definition-center,xychu/product-definition-center,release-engineering/product-definition-center