FLUID-5334: clearing iframe animation queue

Clearing the iframe's jQuery animation queue when the panel is hidden. Previously it could get into a state where the sizing animation would complete after hiding, causing it to appear "open".
Merge branch 'master' into FLUID-5334
FLUID-5334: corrected IoC reference to iframe
Merge remote-tracking branch 'justin/FLUID-5334'

* justin/FLUID-5334:
  FLUID-5334: corrected IoC reference to iframe
  FLUID-5334: clearing iframe animation queue