feat(form-builder): allow custom icon for built-in decorators (#2272)

Author: arthurdenner

packages/@sanity/form-builder/src/inputs/PortableText/Toolbar/helpers.tsx

@@ -27,6 +27,10 @@ function getFormatIcon(
   type: string,
   schemaIcon?: React.ComponentType | string
 ): React.ComponentType {
+  if (schemaIcon) {
+    return schemaIcon as React.ComponentType
+  }
+
   switch (type) {
     case 'strong':
       return FormatBoldIcon
@@ -39,7 +43,7 @@ function getFormatIcon(
     case 'code':
       return FormatCodeIcon
     default:
-      return schemaIcon || SanityLogoIcon
+      return SanityLogoIcon
   }
 }