Defer the holder width hack till after throttled renders complete
Remove resetHolderWidth
Normalize styles
Debounce resizeAndOffset, which is pretty expensive
Merge remote-tracking branch 'ben/throttlefix'

* ben/throttlefix:
  Debounce resizeAndOffset, which is pretty expensive
  Normalize styles
  Remove resetHolderWidth
  Defer the holder width hack till after throttled renders complete

Conflicts:
	pane-switcher.js