made sure the project scene stays in place

HISTORY.md

@@ -11,6 +11,7 @@
 ### 2021-05-19
 * gui: disabled scene icon context menu for project scene
 * gui: disabled dragging the project scene icon
+* gui: made sure the project scene stays in place
 
 ### 2021-05-18
 * gui: fixed exporting media only for a single scene

src/gui.js

@@ -10555,6 +10555,7 @@ SceneAlbumMorph.prototype.reactToDropOf = function (icon) {
             idx += 1;
         }
     });
+    idx = Math.max(idx, 1); // the project scene cannot the rearranged
     this.ide.scenes.add(scene, idx + 1);
     this.updateList();
     icon.mouseClickLeft(); // select