Bug 113104 [hovering] Consider adapting AbstractInformationControl to new PopupDialog
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/typehierarchy/HierarchyInformationControl.java
for (int i= 0; i < sequences.length; i++) {
						if (sequences[i].equals(keySequence)) {
							e.doit= false;
							toggleHierarchy();
							return;
						}
					}
				}
			};			
		}
		return fKeyAdapter;		
	}
	/**
	 * {@inheritDoc}
	 */
	protected boolean hasHeader() {
		return true;
	}
	
	/**
	 * {@inheritDoc}
	 */
	protected void createHeader(Composite parent) {
		fHeaderLabel= new Label(parent, SWT.NONE);
		
		fHeaderLabel.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
		fHeaderLabel.setFont(JFaceResources.getBannerFont());
	}	
	protected Text createFilterText(Composite parent) {