Style changes and Enhancements
- Added sidebar cookies to save the state of sidebar
- Style changes to Sidebar on open and close
- CSS Cleanup
- Added a number formatter for packets to be separated by commas (eg. 10000 -> 10,000)
- Changed styles for for empty messages on visualization

Change-Id: Ifa012392e3cd47800c518a2bbb3aa42ad205a4c1