Tool ->Articles: Top uni nav not displayed (Mobile)

[jmgasper]

REF:https://topcoder.atlassian.net/browse/PROD-4000

Bug

Tool ->Articles: Top uni nav not displayed (Mobile)

https://qa-community-app.topcoder-dev.com/thrive?navTool=tool

Fix

On mobile, the hero image is overflowing out of it’s container, and covers the uninav. Add overflow:hidden to the hero container. This does not affect desktop in a negative way.