Bug 88352 Operation supports leaks contexts via action handler
I20050315-1100 Susan, this is a different leak from the one that I reported. Test Case: 1. open text editor 2. close text editor ==> DefaultUndoManager is leaked due to undo/redo actions handlers still holding on to the context.
bundles/org.eclipse.core.commands/src/org/eclipse/core/commands/operations/DefaultOperationHistory.java
protected static final int DEFAULT_LIMIT = 20;
	
	/**
	 * An operation info status describing the condition that there is no available
	 * operation for redo.
	 */
	public static final IStatus NOTHING_TO_REDO_STATUS = new OperationStatus(
			IStatus.INFO, OperationStatus.NOTHING_TO_REDO,
			"No operation to redo"); 
	/**
	 * An operation info status describing the condition that there is no available
	 * operation for undo.
	 */
	public static final IStatus NOTHING_TO_UNDO_STATUS = new OperationStatus(
			IStatus.INFO, OperationStatus.NOTHING_TO_UNDO,
			"No operation to undo"); 
	/**
	 * An operation error status describing the condition that the operation available
	 * for execution, undo or redo is not in a valid state for the action to be
	 * performed.
	 */
	public static final IStatus OPERATION_INVALID_STATUS = new OperationStatus(
			IStatus.ERROR, OperationStatus.OPERATION_INVALID,
			"Operation is not valid"); 
	/**