Answer whether the receiver would be a happy inheritor of keyboard focus if tab were hit in an enclosing playfield under propitious circumstances. Does not make sense for this kind of morph, which is encased in a window
A change has taken place in my paragraph, as a result of editing and I must be updated. If a line break causes recomposition of the current paragraph, or it the selection has entered a different paragraph, then the current editor will be released, and must be reinstalled with the resulting new paragraph, while retaining any editor state, such as selection, undo state, and current typing emphasis.