Update sidebar to match main navigation pages

[xamberl]

I updated the sidebar to match the order of the main navigation pages.

• HTC guides will only show HTC guides
• HPC guides will only show HPC guides

The only problem remaining is that I'd like the general guides (pages tagged with both "htc" and "hpc") to show both HTC and HPC guides. However, this would make the sidebar really long, so I'd like both HTC and HPC guides to be collapsible only on the general guides. I wasn't able to figure it out, but I think some kind of button can be added to these lines instead of the <h6>:

chtc-website-source/_includes/guide-sidebar.liquid

Lines 17 to 21 in a880633

	{% if show_guide.first %}
	<h6 class="mt-5">{{ item }}</h6>
	{% else %}
	<h6 class="mt-5">{{ item }}</h6>
	{% endif %}

@CannonLock, do you have any suggestions?

[CannonLock]

LGTM! I tweaked the styles so that it scrolls if it overflows which will sort out the issue with content being hidden on the shared pages.

[CannonLock]

To answer the question I suggest keeping things expanded and in the rare case that something is hidden let the user scroll for it. I think that is more intuitive then hiding all the values off the bat.