Member VICI::Canvas::Canvas::setExecution (bool active, csr node)=0: node should be NodeId type
Member VICI::Canvas::Canvas::symbolAttr (Symbol::SymbolAttributes &att)=0: this appears to be meaningless without the symbol
Member VICI::Symbol::SymbolClient::selection (Symbol *sym)=0: do we need to notify of deselection ?
Class VICI::Symbol::TextAttributes: should also include the style - bold, itallic, normal