Update app.py

app.py

@@ -642,7 +642,7 @@ async(c, o, p, d, n, m)=>{
           document.getElementById("cnum").innerHTML += '<option value="' + o_[j] + '">' + j + '</option>';
         }
         loadEditControl();
-        const editControl = new EditControl(BABYLON.Engine.LastCreatedScene.meshes[BABYLON.Engine.LastCreatedScene.meshes.length-1-parseInt(document.getElementById("cnum").value)], BABYLON.Engine.LastCreatedScene.activeCamera, document.getElementById("model3D").getElementsByTagName("canvas")[0], 1.0, true, 0.02);
+        const editControl = new EditControl(BABYLON.Engine.LastCreatedScene.meshes[BABYLON.Engine.LastCreatedScene.meshes.length-1], BABYLON.Engine.LastCreatedScene.activeCamera, document.getElementById("model3D").getElementsByTagName("canvas")[0], 1.0, true, 0.02);
         editControl.enableTranslation();
         document.getElementById("cnum").onchange = function(e) {
           editControl.switchTo(BABYLON.Engine.LastCreatedScene.meshes[BABYLON.Engine.LastCreatedScene.meshes.length-1-parseInt(e.target.value)], true);