Move Commit Details and WIP Details into Graph

[justinrobots]

• Combine the Commit Details view and Graph View as siblings under the repo breadcrumb header.
• Add a “layout-right-panel” icon button to the repo header that toggles the commit detail panel on/off. The icon will change to “layout-right-panel-off” when off.
• Graph search header (with filter, graph search, etc.)
  • should only extend the width of the graph and not above Commit Details.
  • should have a the same background color as the graph with an added bottom border
• Commit Details
  • displayed when a commit is selected
  • header should display commit icon + sha, back, and the menu button. The "pin" and "graph" buttons will be removed.
• WIP
  • displayed when the WIP row is selected in the graph
  • header should display "WIP" along with the file change icons + counts, and the "fetch" button.
• Commit Details should refresh when the graph refreshes

Design
Clickable Prototype
(toggling panel on/off, switching context between commit and wip)

In this phase the content of the views (autolinks, working changes, file changes, etc.) for both the commit and wip views will generally remain unchanged unless otherwise noted.