Fixing the initial tab highlight (the tabs and order had changed, so this bug came bug, albeit for a different reason).
Also, some refactoring.
No more home panel (for now).
Rename index constants inline with what's displayed on UI.
Deleted redundant code.
Deleted empty template.
Changed VIEW to VISUALIZE
Renamed PortalPanel to VisualizePanel.
Refactoring - introduced SearchBodyPanel, and moved some functionality into more appropriate locations.
Inserted fragment identifier.
Renamed 'visualize' to 'visualise'.
'downloadCartPanel' to 'downloadPanel'.
Removed drag and drop config.
Deleted orphan function.
Merge pull request #348 from aodn/initial_tab_highlight_2

Fixing the initial tab highlight (the tabs and order had changed, so thi...