Bug 294790 [KeyBindings] LegacyActionTools should support SWT.F13 - F20
bundles/org.eclipse.jface/src/org/eclipse/jface/action/LegacyActionTools.java
modString = findModifierString(keyCode & SWT.COMMAND);
			} else {
				modString = modString
						+ "+" + findModifierString(keyCode & SWT.COMMAND); 
			}
		}
		return modString;
	}
	/**
	 * Initializes the internal key code table.
	 */
	private static final void initKeyCodes() {
		keyCodes = new HashMap(40);
		keyCodes.put("BACKSPACE", new Integer(8)); 
		keyCodes.put("TAB", new Integer(9)); 
		keyCodes.put("RETURN", new Integer(13)); 
		keyCodes.put("ENTER", new Integer(13)); 
		keyCodes.put("ESCAPE", new Integer(27)); 
		keyCodes.put("ESC", new Integer(27)); 
		keyCodes.put("DELETE", new Integer(127)); 
		keyCodes.put("SPACE", new Integer(' ')); 
		keyCodes.put("ARROW_UP", new Integer(SWT.ARROW_UP)); 
		keyCodes.put("ARROW_DOWN", new Integer(SWT.ARROW_DOWN)); 
		keyCodes.put("ARROW_LEFT", new Integer(SWT.ARROW_LEFT)); 
		keyCodes.put("ARROW_RIGHT", new Integer(SWT.ARROW_RIGHT)); 
		keyCodes.put("PAGE_UP", new Integer(SWT.PAGE_UP)); 
		keyCodes.put("PAGE_DOWN", new Integer(SWT.PAGE_DOWN)); 
		keyCodes.put("HOME", new Integer(SWT.HOME)); 
		keyCodes.put("END", new Integer(SWT.END)); 
		keyCodes.put("INSERT", new Integer(SWT.INSERT));