am 980d12b: Merge change 838 into donut

Merge commit '980d12b13bad50d6fbb50f3fe8f8dbc451a7d87c'

* commit '980d12b13bad50d6fbb50f3fe8f8dbc451a7d87c':
  Fix typo in exception message and add a new exception if the user tries to use the same child as both the handle and content for the SlidingDrawer.