enable AutoFilter and set reasonable column widths in XLSX

content.js

@@ -264,6 +264,8 @@ const API_FIELD_MAP = {
     "how_did_you_become_aware_arr": "Wie sind Sie auf die Stelle aufmerksam geworden?",
 }
 
+const COL_WIDTHS = [ 17, 20.03, 33.45, 17.25, 12.95, 31.43, 38.52, 12.57, 15.73, 55.23, 31.68, 35.35, 37.63, 20.29, 191.81, 11.68, 21.17, 45.73 ]
+
 function createApplicantsXlsx(applicantDetailsList) {
   const sorted_mapped = applicantDetailsList.sort((appli1, appli2) => {
     appli1.last_name.localeCompare(appli2.last_name)
@@ -275,6 +277,19 @@ function createApplicantsXlsx(applicantDetailsList) {
     return mapped
   })
   const sheet = XLSX.utils.json_to_sheet(sorted_mapped)
+
+  // enable easy filtering, sorting
+  sheet["!autofilter"] = { ref: `A1:R${applicantDetailsList.length}` }
+
+  // set basic column widths
+
+  /* create !cols array */
+  sheet["!cols"] = [];
+
+  COL_WIDTHS.forEach((width, idx) => {
+    sheet["!cols"][idx] = { width };
+  })
+
   const book = XLSX.utils.book_new()
   XLSX.utils.book_append_sheet(book, sheet, "Applications")
   return new Uint8Array(XLSX.toXLSXBlob(book).buffer)