Issue #3448344 by Rajeshreeputra, calebtr, mstrelan, catch, chandu7929: Update...

Issue #3448344 by Rajeshreeputra, calebtr, mstrelan, catch, chandu7929: Update for core CSS library changes in 10.3.x

css/core/dialog/off-canvas.base.css

@@ -5,7 +5,7 @@
 
 /* Set some global attributes. */
 #drupal-off-canvas:not(.drupal-off-canvas-reset),
-#drupal-off-canvas {
+#drupal-off-canvas-wrapper {
   color: #ddd;
   background: #444;
 }