Removes dual layout from dynamo to prevent nav menu from auto closing, Styling for version drop down

@coderoshi - Two things:

1) blockCount variable was incrementing too soon, causing the version-[blockCount] classes to be staggered in the markup, so I added a quick fix to version-bar.coffee.erb

2) I styled the version drop downs. It's looking good but 1.0.0 appears detached from the rest of 1.x.x because it belongs to the "riakcscontrol" project in versions.yml. Do you think we should write a conditional so that the 'first' class is not applied to 1.1.0? That would remove the margin between 1.0.0 and 1.1.0. If not, I can come up with a new color for 1.0.0