Update app.py

app.py

@@ -639,12 +639,19 @@ async(c, o, p, d, n, m)=>{
           BABYLON.Engine.LastCreatedScene.meshes[BABYLON.Engine.LastCreatedScene.meshes.length-1].material.useAlphaFromDiffuseTexture = true;
           BABYLON.Engine.LastCreatedScene.meshes[BABYLON.Engine.LastCreatedScene.meshes.length-1].applyDisplacementMap(m[o_[j]].url, 0, 255, function(m){try{alert(BABYLON.Engine.Version);}catch(e){alert(e);}}, null, null, true, function(e){alert(e);});
 
-          document.getElementById("cnum").innerHTML += "<option value=\"" + j + "\">" + j + "</option>";
+          const opt = document.createElement("option");
+          opt.value = j;
+          opt.innerText = j;
+          document.getElementById("cnum").appendChild(opt);
         }
         loadEditControl();
         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);
+        }
+        
         if (document.getElementById("model")) {
           document.getElementById("model").appendChild(document.getElementById("model3D"));
           toggleDisplay("model");
@@ -975,9 +982,7 @@ with gr.Blocks(css=css, js=js, head=head) as demo:
               BABYLON.Engine.LastCreatedScene.activeCamera.metadata.pipeline.imageProcessing.exposure = this.value;
               this.parentNode.childNodes[2].innerText = BABYLON.Engine.LastCreatedScene.activeCamera.metadata.pipeline.imageProcessing.exposure;
             '/><span>1.0</span>""")
-            control = gr.HTML(value="""<select id='cnum' style='color:black;line-height:1em' onchange='
-              editControl.switchTo(BABYLON.Engine.LastCreatedScene.meshes[BABYLON.Engine.LastCreatedScene.meshes.length-1-parseInt(this.value)], true);
-            '></select>
+            control = gr.HTML(value="""<select id='cnum' style='color:black;line-height:1em'></select>
             mode<select id='c_mode' style='color:black;line-height:1em' onchange='
           if (this.value == \"move\") {
             editControl.show();