Made deployer summary panel full height.
Merge pull request #394 from huwshimi/deployer-height

Made deployer summary panel full height

QA:
- drag a charm to the canvas
- click deploy in the deployer bar
- the summary panel should appear and should be 10px below the environment header. See mockup for reference: https://docs.google.com/a/canonical.com/file/d/0B_l975nRB6BuSXdNYVVoVDZVOEU/edit