Add 's' method to access theme props (#5163)

app/editor/components/ToolbarButton.tsx

@@ -1,4 +1,5 @@
 import styled from "styled-components";
+import { s } from "@shared/styles";
 
 type Props = { active?: boolean; disabled?: boolean };
 
@@ -18,7 +19,7 @@ export default styled.button.attrs((props) => ({
   outline: none;
   pointer-events: all;
   position: relative;
-  color: ${(props) => props.theme.toolbarItem};
+  color: ${s("toolbarItem")};
 
   &:hover {
     opacity: 1;