Merge branch 'FLUID-5200'

* FLUID-5200:
  FLUID-5201: cleanup.
  FLUID-5201: Removed another call to fluid.defaults
  FLUID-5201: Updated the isPanel function
  FLUID-5201: Added an isActivePanel function
  FLUID-5200: removed the magic number
  FLUID-5200: handling parentRelativeID's
  FLUID-5202: expanded valuebinding rebasing
  FLUID-5202: initial model for subpanels
  FLUID-5201: Composite panel less aggressive
Merge branch 'master' into FLUID-5190
FLUID-5190: Fixed a typo.