Portfolio tweaks

Adjusted desktop placement of portfolio grid top to be inline with
sidebar nav menu.

Adjusted portfolio item title (when viewing specific portfolio content)
to be top inline with sidebar nav.

Added scrollTop: 0, to show_portfolio function.  Now scrolls to top of
grid when loading portfolio from "view work" link on 'homepage' DIV.
Portfolio tweaks

Adjusted individual portfolio titles inlined with sidebar nav at tablet
width.