Text edit two diagram

[walter]

Try again with version 2.1.8.

GoJS version 2.1.8

Changes for 2.1.8 Added the Game of Life cellular automation sample. You can improve the performance of an Overview that is observing a large diagram with a visible Diagram.grid by setting Overview.drawsTemporaryLayers to false. Improved the behavior from 2.1.7 when trying to open text editors in multiple diagrams. A new text editor can be started only if the previous one was able to be accepted. If TextBlock.textValidation or TextEditingTool.textValidation fails, focus remains in that older e…