Issue #3145930 by bnjmnm, msuthars, nod_: Tableheader should recalculate on toolbar tray toggle

core/misc/tableheader.es6.js

@@ -139,12 +139,12 @@
   // Bind to custom Drupal events.
   $(document).on({
     /**
-     * Recalculate columns width when window is resized and when show/hide
-     * weight is triggered.
+     * Recalculate columns width when window is resized, when show/hide weight
+     * is triggered, or when toolbar tray is toggled.
      *
      * @ignore
      */
-    'columnschange.TableHeader': tableHeaderResizeHandler,
+    'columnschange.TableHeader drupalToolbarTrayChange': tableHeaderResizeHandler,
 
     /**
      * Recalculate TableHeader.topOffset when viewport is resized.

core/misc/tableheader.js

@@ -78,7 +78,7 @@
     'scroll.TableHeader': tableHeaderOnScrollHandler
   });
   $(document).on({
-    'columnschange.TableHeader': tableHeaderResizeHandler,
+    'columnschange.TableHeader drupalToolbarTrayChange': tableHeaderResizeHandler,
     'drupalViewportOffsetChange.TableHeader': tableHeaderOffsetChangeHandler
   });
   $.extend(TableHeader, {