GUI-325: Refactor volume views to keep things DRY and to prepare for filter rework on volumes landing page.
GUI-325: Filters for volumes landing page.
GUI-325: Graceful fallback for landing pages that don't have filters.
Better detection of chosen widget capability.
Merge branch 'develop' into GUI-325
GUI-325: No longer need to parse URL params in landing pages JS.
GUI-325: Filters for Images landing page.
GUI-325: Filters for Instances landing page.
GUI-325: Allow tags to be passed as comma-separated values for landing page filters.
GUI-325: Add filters to Snapshots landing page.  Remove ellipsis overflow for id column in landing page table view.
GUI-325: Add filters to Security Groups landing page.
GUI-325: No longer need the landing page filters macro since we're using a panel-based approach now.
Handle missing dict_of_lists method for unit tests.
GUI-325: Fix images and security groups unit tests.
Simplify attribute lookup.
Merge pull request #156 from eucalyptus/GUI-325

GUI-325: Revamped Landing Page Filters