Really nice - really like it for just fiddling around with models. One missing feature would be an "undo" function - I accidentally deleted a layer and couldn'

Really nice - really like it for just fiddling around with models. One missing feature would be an "undo" function - I accidentally deleted a layer and couldn't find a way to undelete it? Edit: just found an error when trying to actually train a network: TypeError: Argument 1 of WebGL2RenderingContext.clientWaitSync is not an object. This was doing a very simple MNIST->dense(200)->dense(1)->output model using Firefox 65