Tab defaults

@lowercasedonkey

Something broke and the tabs are no longer defaulting in at least introSummary and startingGirls.

tabBtn = document.getElementsByClassName('tablinks').item(0); - tablinks should be tab-links, probably. Too late for me to test tonight but it'll give you a place to start.

mentioned in merge request !7464 (merged)

closed via merge request !7464 (merged)

mentioned in commit 3ba6b0ee