Fixes #1433
Cart widget appears when collections are added. It links to Download tab Step3
Merge pull request #1434 from aodn/issue-1433

Fixes #1433 - the autozoom to layer checkbox label is now visible
Uniform look of search results title bars on step one
review changes
Merge pull request #1436 from aodn/reset-cart

Cart widget appears when collections are added. It links to the Download tab
Merge pull request #1439 from aodn/step1UniformStyling

Uniform look of search results title bars on step one
Clear and reset button on step 3. Messages on empty step2 and 3 are now the same