Implement preference conversion for Editor and CodeInspection
Add conversion for Editor
Merge branch 'PreferencesModel' into dangoor/pref-conversion
Integration test works
Rename brackets.prefs to brackets.json in the PreferencesBase-test
Merge branch 'PreferencesModel' into dangoor/pref-conversion
Responding to review comments.

Adjusting jsdoc comments in PreferenceManager and adding leading
underscore for a private function in Editor.js
Merge pull request #6459 from adobe/dangoor/pref-conversion

Implements preference conversion