Fixed dialog not removing from DOM

emscripten/project/purr-data/index.html

@@ -36,7 +36,7 @@
         <div class="modal-content">
           <div class="modal-header">
             <h5 class="modal-title" id="dialog-title"></h5>
-            <button type="button" class="close" data-dismiss="modal" aria-label="Close">
+            <button type="button" class="close" onClick="cancel()" aria-label="Close">
               <span aria-hidden="true">&times;</span>
             </button>
           </div>

pd/nw/dialog_canvas.html

@@ -613,7 +613,6 @@ function cancel() {
     var i, attrs, gfxstub;
     //window.close(true);
     if(pdgui.is_webapp()){
-      remove_dialog(pd_object_callback)
       $("#dialog-modal").modal("hide");
     }
 
@@ -804,6 +803,12 @@ function add_events(name) {
       });
     }
     pdgui.dialog_bindings(name);
+    if (pdgui.is_webapp) {
+      $("#dialog-modal").on("hidden.bs.modal", function (e) {
+        remove_dialog(pd_object_callback)
+        $("#dialog-modal").off("hidden.bs.modal")
+      })
+    }
 }
 
   </script>