revent switching to another sprite if a "hide blocks" dialog is open

snap.html

@@ -20,7 +20,7 @@
         <script src="src/threads.js?version=2021-10-22"></script>
         <script src="src/objects.js?version=2021-10-29"></script>
         <script src="src/scenes.js?version=2021-10-12"></script>
-        <script src="src/gui.js?version=2021-11-03"></script>
+        <script src="src/gui.js?version=2021-11-07"></script>
         <script src="src/paint.js?version=2021-07-05"></script>
         <script src="src/lists.js?version=2021-07-19"></script>
         <script src="src/byob.js?version=2021-11-07"></script>

src/gui.js

@@ -79,13 +79,14 @@ CommandBlockMorph, BooleanSlotMorph, RingReporterSlotMorph, ScriptFocusMorph,
 BlockLabelPlaceHolderMorph, SpeechBubbleMorph, XML_Element, WatcherMorph, WHITE,
 BlockRemovalDialogMorph,TableMorph, isSnapObject, isRetinaEnabled, SliderMorph,
 disableRetinaSupport, enableRetinaSupport, isRetinaSupported, MediaRecorder,
-Animation, BoxMorph, BlockDialogMorph, RingMorph, Project, ZERO, BLACK*/
+Animation, BoxMorph, BlockDialogMorph, RingMorph, Project, ZERO, BLACK,
+BlockVisibilityDialogMorph*/
 
 /*jshint esversion: 6*/
 
 // Global stuff ////////////////////////////////////////////////////////
 
-modules.gui = '2021-November-03';
+modules.gui = '2021-November-07';
 
 // Declarations
 
@@ -2797,13 +2798,15 @@ IDE_Morph.prototype.stopAllScripts = function () {
 };
 
 IDE_Morph.prototype.selectSprite = function (sprite) {
-    // prevent switching to another sprite if a block editor is open
+    // prevent switching to another sprite if a block editor or a block
+    // visivility dialog box is open
     // so local blocks of different sprites don't mix
     if (
         detect(
             this.world().children,
             morph => morph instanceof BlockEditorMorph ||
-                morph instanceof BlockDialogMorph
+                morph instanceof BlockDialogMorph ||
+                morph instanceof BlockVisibilityDialogMorph
         )
     ) {
         return;
@@ -4705,7 +4708,7 @@ IDE_Morph.prototype.aboutSnap = function () {
         module, btn1, btn2, btn3, btn4, licenseBtn, translatorsBtn,
         world = this.world();
 
-    aboutTxt = 'Snap! 7 - dev211103 -\nBuild Your Own Blocks\n\n'
+    aboutTxt = 'Snap! 7 - dev211107 -\nBuild Your Own Blocks\n\n'
         + 'Copyright \u24B8 2008-2021 Jens M\u00F6nig and '
         + 'Brian Harvey\n'
         + 'jens@moenig.org, bh@cs.berkeley.edu\n\n'

sw.js

@@ -1,4 +1,4 @@
-var snapVersion = '7-dev211103'
+var snapVersion = '7-dev211107'
 
 var cacheName = 'snap-pwa',
     filesToCache = [