`StackContainer` (a parent class of `TabContainer`) has an `_onKeyPress` method that receives DOM `keypress` events and publishes them to a controller that listens for hotkeys and switches children around.  Disappointingly, there's no programmatic API to disable keyboard shortcuts on a `StackContainer`, so this replaces the _onKeyPress method on the instance of `TabContainer` created declaratively from the HTML with a function that does nothing, disconnecting the controller from the DOM keypress events.

Yeah, I know this sucks.