Bug 113104 [hovering] Consider adapting AbstractInformationControl to new PopupDialog
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/AbstractInformationControl.java
layout.marginHeight= 0;
		layout.marginWidth= 0;
		fViewMenuButtonComposite.setLayout(layout);
		fViewMenuButtonComposite.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
		if (hasHeader()) {
			createHeader(fViewMenuButtonComposite);
			fFilterText= createFilterText(fComposite);
		} else {
			fFilterText= createFilterText(fViewMenuButtonComposite);
		}
		createViewMenu(fViewMenuButtonComposite);
		createHorizontalSeparator(fComposite);
		fTreeViewer= createTreeViewer(fComposite, treeStyle);
		fCustomFiltersActionGroup= new CustomFiltersActionGroup(getId(), fTreeViewer);
		if (showStatusField)
			createStatusField(fComposite);
		final Tree tree= fTreeViewer.getTree();
		tree.addKeyListener(new KeyListener() {
			public void keyPressed(KeyEvent e)  {
				if (e.character == 0x1B) 
					dispose();
			}
			public void keyReleased(KeyEvent e) {
				
			}
		});
		tree.addSelectionListener(new SelectionListener() {
			public void widgetSelected(SelectionEvent e) {
				
			}