Make project names on homepage sticky

[Matthew White]

@issa-tseng suggested adding the following CSS to .project-home-block .title:

background-color: #f7f7f7;
box-shadow: 0 0 20px #f7f7f7;
position: sticky;
top: 0;

[Matthew White]

@sadiqkhoja, you're working on the homepage right now, right? Would it be possible to add these styles while you're in there?