Bug 18067 Packages View filters not applied when eclipse restarted
Eclipse F1 1) Create a java project with a .classpath file 2) In the packages view open the filter dialog and uncheck "Hide .* files". 3) Notice that the .classpath file is visible 4) Exit eclipse 5) Launch eclipse again. 6) Notice that the .classpath file is not visible in the packages view 7) Open the filter dialog for the Packages view. Notice that "Hide .* files" is still unchecked.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/packageview/PackageExplorerActionGroup.java
void handleDoubleClick(DoubleClickEvent event) {
		TreeViewer viewer= fPart.getViewer();
		Object element= ((IStructuredSelection)event.getSelection()).getFirstElement();
		if (viewer.isExpandable(element)) {
			if (JavaBasePreferencePage.doubleClickGoesInto()) {
				
				if (element instanceof IOpenable && 
					!(element instanceof ICompilationUnit) && 
					!(element instanceof IClassFile)) {
					fZoomInAction.run();
				}
			} else {
				if (element instanceof ICompilationUnit && OpenStrategy.getOpenMethod() == OpenStrategy.DOUBLE_CLICK)
					return;
				viewer.setExpandedState(element, !viewer.getExpandedState(element));
			}
		}
	}
	
	 void handleOpen(OpenEvent event) {
		IAction openAction= fNavigateActionGroup.getOpenAction();
		if (openAction != null && openAction.isEnabled()) {
			openAction.run();
			return;
		}
	}
	
	 void handleKeyEvent(KeyEvent event) {
		if (event.stateMask != 0)