Improve main page layout

Before:
![before](https://f.cloud.github.com/assets/252023/639758/e30195ca-d2db-11e2-8fb0-a4f7c7d2a77a.png)

After:
![after](https://f.cloud.github.com/assets/252023/639768/4d68ba74-d2dc-11e2-80bc-7f896828da75.png)

Fluid layout allows you to put MOAR GRAPHZ per row (very useful for Full-HD monitors) by setting a smaller widget width (2-3), yet they will still be wide enough. On smaller monitors, extra widgets will be wrapped.