Fixes #584 email address placeholder text removal

For an AODAAC download there is placeholder text in the input, when the
user clicks in the field this should automatically clear, unfortunately
we cannot use the placeholder attribute yet http://caniuse.com/input-placeholder
Changes based on review
Merge pull request #593 from aodn/issue-584

Fixes #584 email address placeholder text removal
Renamed poorly-named component
Improving i18n keys
Tidy up depth/elevation label usage
Missed some references, depthInfoPanel is now a property
Increase width of GFI Popup
Rewording
Make GFI Popup bigger.

550px fits on a 1024x768 screen just fine.
Removed SQL migration
Merge branch 'issue-589' of https://github.com/aodn/aodn-portal into issue-589