added forgotten sethumanreadable.js

onionr/static-data/www/mail/sethumanreadable.js

@@ -0,0 +1,10 @@
+function setHumanReadableValue(el, key){
+    fetch('/getHumanReadable/' + key, {
+        headers: {
+          "token": webpass
+        }})
+    .then((resp) => resp.text())
+    .then(function(resp) {
+        el.value = resp
+    })
+}