arabic numerals for hgno aria labels

src/components/Header.vue

@@ -83,6 +83,16 @@ export default {
       })
       return hgnos.join(", ")
     },
+    hgno_arabic: function() {
+    let hgnos = []
+    this.lemmas.forEach(lemma => {
+      let hgint = parseInt(lemma.hgno)
+      if (hgint > 0) {
+        hgnos.push(hgint)
+        }
+    })
+    return hgnos.join(", ")
+    },
     inflection_button_text: function() {
       return {
         "bm": {false: "Se bøyning", true: "Skjul bøyning"},