aes_string() is deprecated

[JoachimGoedhart]

I have successfully replaced aes_string() with aes() in SuperPlotsOfData - this works:

        if (input$add_shape) {
          vorm <- sym('Replica')
        } else {vorm <- NULL}

In combination with:

p <- p + geom_jitter(data=klaas, aes(x=Condition, y=Value, color = Replica, shape = !!vorm, fill = Replica),
                 width=data_width*0.8,
                 height=0.0, cex=input$dot_size, alpha=input$alphaInput
                 )

Yet, this needs to be propagated to remainder of code (and other apps!) as aes_string() will be deprecated.