Clicking on category twice will produce search results

[enriquezm]

Issue resolved by @parkjc

https://flow.coe.hawaii.edu/tag/COE%20Website/

Problem was:

• Clicking on a post's category link from a tag listing page was causing a "no search results" bug.

How it was fixed:

• tag_index.html was still searching categories that had capital letters
• had to downcase the category portion in the tags file