Bug 204458 [Commands] Allow menu and toolbars to fire execution events
Keybindings will currently fire execution events when executing actions from the action framework. i.e. IActions with their actionDefinitionId set and IActionDelegates with the definitionId attribute in their action contributions. But it would be nice if selecting the menu or tool item would also fire the equivalent events. PW
bundles/org.eclipse.core.commands/src/org/eclipse/core/commands/CommandManager.java
switch (c) {
					case PARAMETER_START_CHAR:
					case PARAMETER_END_CHAR:
					case ID_VALUE_CHAR:
					case PARAMETER_SEPARATOR_CHAR:
					case ESCAPE_CHAR:
						buffer.append(c);
						break;
					default:
						throw new SerializationException(
								"Invalid character '" + c + "' in escape sequence"); 
					}
				} else {
					throw new SerializationException(
							"Unexpected termination of escape sequence"); 
				}
			}
		}
		if (buffer == null) {
			return escapedText;
		}
		return buffer.toString();
	}
	/**
	 * The map of category identifiers (<code>String</code>) to categories (
	 * <code>Category</code>). This collection may be empty, but it is never
	 * <code>null</code>.
	 */
	private final Map categoriesById = new HashMap();
	/**