fix (overview): add check for app select params
fix (overview): add check for app select params

Add check for expected parameters in the event delegate for appList.
Prior to commit b7c120e65253e902dd7dcc585cf33c9fb77300a1, the on.appList
call was given a target ('appList') and the selected app path. The b7c120e
squill commit removes the initial target parameter - add support for
either format.

gameclosure/devkit,gameclosure/devkit,gameclosure/devkit