Use the correct hover color for form panel icons

client/scss/components/_panel.scss

@@ -72,6 +72,7 @@ $header-button-size: theme('spacing.6');
 
   &:focus-visible,
   &:hover {
+    color: theme('colors.icon-primary-hover');
     background-color: theme('colors.white-10');
 
     @media (forced-colors: active) {