JS refactors (#22227)

- Replace all default exports with named exports, except for Vue SFCs
- Remove names from Vue SFCs, they are automatically inferred from the
filename
- Misc whitespace-related tweaks

web_src/js/features/tablesort.js

@@ -1,4 +1,4 @@
-export default function initTableSort() {
+export function initTableSort() {
   for (const header of document.querySelectorAll('th[data-sortt-asc]') || []) {
     const sorttAsc = header.getAttribute('data-sortt-asc');
     const sorttDesc = header.getAttribute('data-sortt-desc');