autofocus first term of autocomplete for convenience

app/assets/javascripts/artists.js

@@ -14,6 +14,7 @@
   Danbooru.Artist.initialize_auto_complete = function() {
     $("#quick_search_name").autocomplete({
       minLength: 1,
+      autoFocus: true,
       source: function(req, resp) {
         $.ajax({
           url: "/artists.json",

app/assets/javascripts/pools.js

@@ -16,6 +16,7 @@
 
     $("#c-pool-elements #a-new input[type=text]").autocomplete({
       minLength: 1,
+      autoFocus: true,
       source: function(req, resp) {
         $.ajax({
           url: "/pools.json",

app/assets/javascripts/posts.js

@@ -39,6 +39,7 @@
     var $fields = $("#tags,#post_tag_string,#upload_tag_string");
 
     $fields.autocomplete({
+      autoFocus: true,
       focus: function() {
         return false;
       },

app/assets/javascripts/wiki_pages.js

@@ -11,6 +11,7 @@
     if (Danbooru.meta("enable-auto-complete") === "true") {
       $("#quick_search_title,#wiki_page_title").autocomplete({
         minLength: 1,
+        autoFocus: true,
         source: function(req, resp) {
           $.ajax({
             url: "/wiki_pages.json",