[dashboard] Alphabetically sort imports and scripts. Remove some unused imports.
[dashboard] Alphabetically sort imports and scripts. Remove some unused imports.

madmatt/nodecg,madmatt/nodecg,nodecg/nodecg,nodecg/nodecg,nodecg/nodecg,IgorCandido/igrcnddStreamNotifications,IgorCandido/igrcnddStreamNotifications