EUCA-8168

Discovered that the memory leak amount is reduce to half when the databox and search collections are properly closed.

However, there exist more memory leak issues, which need to be further investigated.
Resolved the conflicts by stopping listeners
Freed more data holders
Added IDs to the keypair rows in the landing page
Fixed the dangling eucatable_bb listener issue
Adding reset to the search config image collections
Improved the memory leak issue on the launcher by calling the close call on the widget and wizard.
Merge pull request #236 from eucalyptus/EUCA-8168

EUCA-8168, after testing with ActivityMonitor going, I like what I'm seeing.