Add some sweet icons.
Add printing signal.
Massively rearrange layout and incorporate icons.
Fix downloading doc.
Clicking the title now scrolls you to the top of the document.
Left-align everything on the left sidebar.
Combine the left sidebar header and file controls; use icons.
Fix some stylesheet stupidity on the left sidebar.
Distribute the controls in the top-left according to flexbox rules.
Restyle the outline a bit.
Clean up obsolete style.
Make icons in upper-left handle resize a bit better.
Adjust editor button alignment to account for both scroll bars and icons.