Takes long time to evalution when huge grid is open
Takes long time to evalution when huge grid is open

- Grid window subscribe to evaluation. The representation was not specified, and the automatic evaluation takes long time with huge matrix. Fix is simply specifying str for variable representation.

MikhailArkhipov/RTVS,karthiknadig/RTVS,karthiknadig/RTVS,AlexanderSher/RTVS,MikhailArkhipov/RTVS,MikhailArkhipov/RTVS,MikhailArkhipov/RTVS,AlexanderSher/RTVS,AlexanderSher/RTVS,karthiknadig/RTVS,karthiknadig/RTVS,AlexanderSher/RTVS,MikhailArkhipov/RTVS,karthiknadig/RTVS,AlexanderSher/RTVS,AlexanderSher/RTVS,MikhailArkhipov/RTVS,AlexanderSher/RTVS,MikhailArkhipov/RTVS,karthiknadig/RTVS,karthiknadig/RTVS