Enable pretty print option in IceTipDiffPanel (Nice to have for some?)

[ironirc]

IceTipDiffPanel>>#initializeDiffPanel
    diffPanel showOptions: true

IceTipDiffPanel>>#selectionChanged
    | itemValue |
    itemValue := iceNodesTree selectedItem value.
    itemValue ifNotNil: [ 
        diffPanel contextClass: itemValue contextClass.
        self
            diffContentsLeft: itemValue rightContents
            right: itemValue leftContents ]