1. Add a new 'search' service
2. Got to page 2, click on 'Start to select criteria'
3. Go back to page 1, change the content types and add one (for instance 'Article')
4. Go to page 2, all changes in criteria widget are lost (i.e. if we are in an edition of the service, it is terrible, all criterion values are lost)

CMS-9737 is in cause (I tested with the version of SearchCriteria.js before this commit and it works again)

in SearchCriteria.js:437 oldValues is null