Mike Herchel
--- a/core/modules/navigation/css/components/toolbar-button.pcss.css
+++ b/core/modules/navigation/css/components/toolbar-button.pcss.css
  }
 }

+/**
+ * In Windows high contrast mode, the icons can be obscured by the text from the
+ * data attribute. Since this is not needed if the icon exists, we remove it.
+ *
+ * @todo This code replicates the functionality of the style query (line 115).
+ * Not all supported browsers yet support style queries, so this is a fallback
+ * that can eventually be removed.
+ *
+ * @see https: //caniuse.com/css-container-queries-style
+ */
+.toolbar-button--icon--back,