Drag and drop nodes sometimes calculates wrong its final position

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.5.x
• Fix Version/s: 1.5.x, 1.5.2.6
• Component/s: Portal Layout (deprecated)
• Labels: None
• Environment: Alloy 1.5.x; Liferay portal 6.1.x
• Fix Priority: 2
• Git Pull Request: https://github.com/natecavanaugh/alloy-ui/pull/249

This problem doesn't occur in master because the styles have changed to bootstrap.

Steps to reproduce (with liferay portal 6.1.x):
===================
select 2 columns layout
set column-2 with login portlet
set column-2 with bookmarks portlet
drag & drop bookmarks portlet below login portlet. Drop it 30 px below the end of login portlet
when the mouse button is released, bookmarks portlet is shown on top of column-1
This happens because the calculation of the position is made in relation of the column-1 container.
Due the display css property of the column, column-1 has exactly the same height of column-2. This is the main cause of the behaviour, because the position is processed using the column height.