Bug 156632 [Acceptance]Cannot paste theme when select Themes in Outline.
Description: Cannot paste theme when select Themes in Outline. Steps to reproduce: 1. New a library. 2. Select defaulttheme in outline and cut it 3. Select Themes and right click to paste the theme back. Expected result: Paste in context menu can be used. Actual result: Paste is gray
UI/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/util/DNDUtil.java
if ( isInSameColumn( new Object[]{
								child, handles[i]
						} ) )
						{
							return true;
						}
						continue;
					}
					
					DesignElementHandle container = child.getContainer( );
					while ( container != null )
					{
						if ( container.equals( handles[i] ) )
						{
							return true;
						}
						container = container.getContainer( );
					}
				}
				else if ( handles[i] instanceof SlotHandle )
				{
					
					if ( child.getContainerSlotHandle( ) == handles[i] )
					{
						return true;
					}
				}
			}
		}
		return false;