never close a dev-warning

HISTORY.md

@@ -11,6 +11,9 @@
 * **Translation Updates:**
     * German
 
+### 2022-03-02
+* gui: never close a dev-warning
+
 ### 2022-03-01
 * blocks: adjusted restoring inputs for relabelling to / from variadic infix reporters
 * blocks: refactored adding and removing inputs in variadic slots

snap.html

@@ -20,7 +20,7 @@
         <script src="src/threads.js?version=2022-03-01"></script>
         <script src="src/objects.js?version=2022-03-01"></script>
         <script src="src/scenes.js?version=2021-11-24"></script>
-        <script src="src/gui.js?version=2022-03-01"></script>
+        <script src="src/gui.js?version=2022-03-02"></script>
         <script src="src/paint.js?version=2021-07-05"></script>
         <script src="src/lists.js?version=2022-02-07"></script>
         <script src="src/byob.js?version=2022-02-17"></script>

src/gui.js

@@ -86,7 +86,7 @@ BlockVisibilityDialogMorph, ThreadManager*/
 
 // Global stuff ////////////////////////////////////////////////////////
 
-modules.gui = '2022-March-01';
+modules.gui = '2022-March-02';
 
 // Declarations
 
@@ -5901,8 +5901,8 @@ IDE_Morph.prototype.switchToScene = function (
     if (!scene || !scene.stage) {
         return;
     }
-    this.siblings().forEach(morph =>
-        morph.destroy()
+    this.siblings().filter(morph => morph.key !== 'Dev-Warning').forEach(
+        morph => morph.destroy()
     );
     this.scene.captureGlobalSettings();
     this.scene = scene;