Bug 151361 default value for reousrce folder user preference
When user does not sepecify the resourec foler user preference, can we make the current project folder (in IDE) or the current report design file's folder (in RCP) as the default value for the resource folder. This way, by default the current project folder is the resource folder where user can create their libs and images. Also please set the default user preference to be null when BIRT is freshly installed.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/util/UIUtil.java
IWorkbenchPage pg = window.getActivePage( );
				if ( pg != null )
				{
					return pg.getActiveEditor( );
				}
			}
			else
			{
				IWorkbenchPage[] pgs = window.getPages( );
				for ( int i = 0; i < pgs.length; i++ )
				{
					IWorkbenchPage pg = pgs[i];
					if ( pg != null )
					{
						IEditorPart editor = pg.getActiveEditor( );
						if ( editor != null )
						{
							return editor;
						}
					}
				}
			}
		}
		return null;
	}
	/**
	 * Returns current project according to current selection. 1. If current
	 * selection is editPart, get editor input and return associated project. 2.
	 * If current selection is not ediPart, use first selected element, query
	 * from its IAdaptable interface to get associated project. 3. If the above