Focus first configuration field when creating new external storage
Add ability to force external storage re-check

Clicking on the status icon at the left of the external storage will re-check
it
Use === in files_external js
Replace .parent() with other jQuery constructs
Highlight applicable box if empty
Fix highlighting on paste
Condense highlightBorder with better jQuery
Remove (required) and (optional) strings from external storage configurations
Prevent wrapping of checkboxes in configuration