Adds support to defer the loading of dataTables data with AJAX. Applied to the sources table on the source query page, this stops the results table from being populated with all sources. The results table is only populated when the user submits a query using the form. If the user wants to view all sources, they can still do this by submitting an empty query.
Adds support to defer the loading of dataTables data with AJAX. Applied to the sources table on the source query page, this stops the results table from being populated with all sources. The results table is only populated when the user submits a query using the form. If the user wants to view all sources, they can still do this by submitting an empty query.
Closes #629