Fixes #1466
Merge pull request #1467 from aodn/issue-1466

Refreshes Step 3 on collection removal
Fixes #1427. Filters are grouped in containers in step 2
Merge pull request #1469 from aodn/issue-1427

Filters are grouped in containers in step 2
layerswitcher moved to the detailpanel. Changed from one instance to one for every collection