VE-1654: Added support for cursoring over results items by reusing OO.ui.SearchWidget.prototype.onQueryKeydown

https://wikia-inc.atlassian.net/browse/VE-1654
Merge branch 've-sprint-31' into VE-1654
VE-1654: Addressed code styling issue
Merge pull request #5303 from Wikia/VE-1654

VE-1654: Added support for cursoring over results items by reusing OO.ui.SearchWidget.prototype.onQueryKeydown