[AI-436] refactored drill down to use pivot sites so that monthly reports are included
[AI-433] Added new LocationType.databaseId column to client-side schema migrator
[AI-514] Workaround for apparent bug in GXT TreeGrid affecting PivotTable Grid
[AI-514] Fixed bug in GXT TreePanel affecting PivotTable

See: https://github.com/bedatadriven/gxt/commit/4093e76a9b6eaf7ff78a53e3d2329d9a908880ff