Add: link to guide for email settings

Author: nichwall

client/pages/config/email.vue

@@ -1,6 +1,14 @@
 <template>
   <div>
     <app-settings-content :header-text="$strings.HeaderEmailSettings" :description="''">
+      <template #header-items>
+        <ui-tooltip :text="$strings.LabelClickForMoreInfo" class="inline-flex ml-2">
+          <a href="https://www.audiobookshelf.org/guides/send_to_ereader" target="_blank" class="inline-flex">
+            <span class="material-icons text-xl w-5 text-gray-200">help_outline</span>
+          </a>
+        </ui-tooltip>
+      </template>
+
       <form @submit.prevent="submitForm">
         <div class="flex items-center -mx-1 mb-2">
           <div class="w-full md:w-3/4 px-1">
@@ -263,4 +271,4 @@ export default {
   },
   beforeDestroy() {}
 }
-</script>
+</script>