Cover screen of flow chart

[ian-crowther]

https://www.dropbox.com/s/fu2yhzz1kdmsn0a/Screenshot%202018-10-12%2012.54.43.png?dl=0

Couple things on this section of the page:

• [ ] I think using SVG that contains the two icon sets and question mark arrow graphic all together will make a coherent layout easier. You've done good work with them when they're separate but I don't think the design really allows for this to be responsive in that way. The unified SVG will allow all the elements to just resize together and stay in place.
• [ ] The entire content of the cover screen (other than the background lines) should scroll away normally on scroll. Right now the progress bar of the following slide scrolls in and overlaps cover screen content awkwardly (https://www.dropbox.com/s/embjwvnm5wf8jnz/Screenshot%202018-10-12%2013.09.16.png?dl=0).