Collapsible FAQ items

[atagar]

Migrated from ticket 19679.

To make things manageable ​Stem's FAQ starts with a header linking to the questions. A nicer approach would be for us to only show the questions, with the answers shown when users click on them.

Not hard and no doubt there's lots of examples we can pull from. One note is that our anchor links need to continue to work. That is to say: providing a link to question X should start with it expanded.

[arthtyagi]

Yeah, you're right, I'll implement this.