[FIX] TextEmphasis class(Object)>>doesNotUnderstand: #plain ( what about other refs to #plain? )

[ned at squeakland.org]

After this CS, there are still the following references to #plain:

EmphasizedMenu onlyBoldItem: {emphasis}
EmphasizedMenu class example1 {examples}
EmphasizedMenu class example3 {examples}
ParagraphEditor changeEmphasis {menu messages}
ParagraphEditor changeEmphasisOrAlignment {menu messages}
ParagraphEditor setEmphasis: {editing keys}
TextMorphEditor changeEmphasisOrAlignment {attributes}

Is it necessary to change these as well?














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