For Editor, use this.own() with dojo/on instead of deprecated this.connect() (which uses the deprecated dojo.connect()).   But still using dojo/_base/connect._keypress synthetic event.  That will be removed in a later checkin.  Refs #16585 !strict.
For non-deprecated dijit widgets, use this.own() with dojo/on or dojo/aspect, instead of deprecated this.connect() (which uses the deprecated dojo.connect()).   Refs #16585 !strict.
Intermediate checkin for !StackContainer to stop using deprecated this.subscribe().  In a later checkin I'd like to get rid of using topics altogether.   Also need to stop using deprecated synthetic keypress event.  Refs #16585 !strict.