Refactor: make Custom appear as second section on sideBar

src/frontend/src/pages/FlowPage/components/extraSidebarComponent/index.tsx

@@ -344,6 +344,10 @@ export default function ExtraSidebar(): JSX.Element {
               return -1;
             } else if (b.toLowerCase() === "saved_components") {
               return 1;
+            } else if (a.toLowerCase() === "custom_components") {
+              return -2
+            } else if (b.toLowerCase() === "custom_components") {
+              return 2
             }else {
               return a.localeCompare(b);
             }