Variable->Where Used->Trigger->Escape->Widget Selected

User story
As an app builder, when I use Where Used from a variable to an associated trigger, I want the widget that contained the trigger to be selected when I return to the app, so I can continue reviewing its trigger list without searching for the widget

Acceptance criteria

  • After returning from the trigger, the originating widget is selected in the app editor.
  • The editor keeps the selected widget visible without scrolling the step-widget list pane

Hey @breiter56! This should be rolling out in r389.