Bug 99886 [package explorer] Package Explorer focus is not synchronized with the active editor part
During startup Package Explorer tree is closed regardless of the editor currently opened.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/packageview/PackageExplorerPart.java
implements ISetSelectionTarget, IMenuListener,
		IShowInTarget,
		IPackagesViewPart,  IPropertyChangeListener, 
		IViewPartInputProvider {
	
	private static final String PERF_CREATE_PART_CONTROL= "org.eclipse.jdt.ui/perf/explorer/createPartControl"; 
	private static final String PERF_MAKE_ACTIONS= "org.eclipse.jdt.ui/perf/explorer/makeActions"; 
	
	private boolean fIsCurrentLayoutFlat; 
	private static final int HIERARCHICAL_LAYOUT= 0x1;
	private static final int FLAT_LAYOUT= 0x2;
	
	public final static String VIEW_ID= JavaUI.ID_PACKAGES;
				
	
	static final String TAG_SELECTION= "selection"; 
	static final String TAG_EXPANDED= "expanded"; 
	static final String TAG_ELEMENT= "element"; 
	static final String TAG_PATH= "path"; 
	static final String TAG_VERTICAL_POSITION= "verticalPosition"; 
	static final String TAG_HORIZONTAL_POSITION= "horizontalPosition"; 
	static final String TAG_FILTERS = "filters"; 
	static final String TAG_FILTER = "filter"; 
	static final String TAG_LAYOUT= "layout"; 
	static final String TAG_CURRENT_FRAME= "currentFramge"; 
	static final String TAG_ROOT_MODE= "rootMode"; 
	static final String SETTING_MEMENTO= "memento";