Duplicate fields break search

[nlaprell]

If a user creates a query or view and uses duplicate field names, when searching the query/view, angular fails to render the page and throws:

angular.js:11655 Error: [ngRepeat:dupes] Duplicates in a repeater are not allowed. Use 'track by' expression to specify unique keys. Repeater: key in results['results-header'], Duplicate key: string:mydupe, Duplicate value: mydupe

Proposed solutions:

• Detect duplicates on search display and rename with incremental numbers (field|field|field becomes field|field (2)|field (3))
• Validate query/view form for duplicate field names and display an error to the user.

[nlaprell]

I updated the query/view wizard to validate against duplicate field names and display an error to the user that the fields need to have unique names.

[nlaprell]

Merged to Master.