Suggestion: Improve visibility of tags

## Issue

Currently, the tags associated with a tutorial are presented at the top of the page. Thus, as you scroll through a tutorial, the tags (which might be of interest to you later) move out of sight (and out of mind.

### Current view at the top of page:


## Suggestion

I suggest moving (or adding) the tags as a fixed column on the left white margin (similar to the TOC on the right side). This would allow the reader to repeatedly re-reference the tags throughout the tutorial.

### Suggested view, after scrolling down the page: