Dropdown menus need to appear when tabbed to

[dajoturner]

This is a follow up to #68. Rob said: The next step is to make them visible when they are tabbed to. I think that can be accomplished with jquery, which is loaded by default on every page.

Changing every main navs HTML is not optimal at this point, but if it's absolutely necessary we can consider it.

[jrosczyk]

Unfortunately, this isn't a quick fix. I'm assigning it to @knice for later.

[dajoturner]

Ok, setting to Fix Later and closing.

[claucasf]

David, I think this issue still needs to be addressed.

[thomasgardner]

In the UCSC Technology Accessibility and Civil Rights in Higher Education workshop for Global Accessibility Awareness Day (5-21-2015) workshop leader Don Barrett, Assistive Technology Specialist, from the US Department of Education / Office for Civil Rights mentioned that this is still an issue in both the 1:00 - 3:00 pm and the 3:30 - 5:30 pm sessions.