code: function adjustTop(placements, containerPosition, initialHeight, currentHeight) {
  	if (placements.indexOf('top') !== -1 && initialHeight !== currentHeight) {
  		return {
  			top: containerPosition.top - currentHeight
  		};
  	}
  }
docs: Provides a way to adjust the top positioning after first
  render to correctly align element to top after content
  rendering causes resized element height
  
  @param {array} placements - The array of strings of classes
  element should have.
  @param {object} containerPosition - The object with container
  position information
  @param {number} initialHeight - The initial height for the elem.
  @param {number} currentHeight - The current height for the elem.