Prioritize sourceHandler over dataLocker
Allow models to pass data source values to the DataGrid widget
Merge pull request #496 from Flynsarmy/gridSourceHandler

Prioritize sourceHandler over dataLocker. Fixes #495
Merge pull request #497 from Flynsarmy/datagriDataSource

Allow models to pass data source values to the DataGrid widget
Improve getAutocompleteValues so model knows what attribute it's dealing with
TraceLog -> EventLog
Cms\ErrorLog -> System\RequestLog
Set up some basic language keys
Add settings pages for new loggers
Write trace log items to the db
Tidy up code. Refs #497
Make request and access log work
Translate values
Add hints to each log page. Fix preview screens for event and request logs.
Roll back the moo
Minor fixes to list setup
Improve getDataSourceValues so model knows what attribute it's dealing with
Add comment
Remove incorrect method arguments