Post History

## The front page is less cluttered without "Question"
With Q&A containing both questions and wiki posts, every question is labelled "Question", like this:

![Current Q&A layout, with every question labelled as "Question"](https://collab.codidact.org/uploads/gspcmvxdejan9pyydy4q2lomaqbg)

If Wiki were a separate Category then the questions in Q&A would not need the "Question" label, looking much less cluttered:

![How Q&A would look without the "Question" labels](https://collab.codidact.org/uploads/p2ck920ysmaa7xcki3w9dt249ztk)