Checkbox list should support preview mode
Config item `cms.customErrorPage` is deprecated, the setting `app.debug` should be used instead.
Config item `cms.enableAssetMinify` can now be set to **null**, in which case assets are only minified if debug mode (`app.debug`) is disabled.
Fixes #373 - FormController can now accept different form fields for create,update,preview
Add new options to RelationController (view mode): recordUrl, recordOnClick, toolbarButtons
Clicking a record in readOnly mode will open the manage form in preview mode
Use "recordOnClick: null" to retain the original behavior
Clean key & Update Ru lang
Switch position :)
Fixes bug where setting statusCode doesn't work for AJAX handlers
Fixes unit tests
Merge pull request #821 from mrmlnc/develop

Clean key & Update Ru lang
* Build 168