1) Added javadoc to various methods. 2) Added an info message saying that no values exist for cluster ID. This is displayed when the user trys to color the tree by cluster ID and no color changes are applied due to the lack of cluster ID values. Prior to this, the user was left wondering why no color changes were applied. 3) Organized the else if statements in actionPerformed so the order is consistent with the order of the MenuItems. This makes it easier to read and interpret the code.
