unified js for dtext previews

app/assets/javascripts/wiki_pages.js

@@ -1,37 +1 @@
-(function() {
-  Danbooru.WikiPage = {};
-  
-  Danbooru.WikiPage.initialize_all = function() {
-    $("#c-wiki-pages #preview").hide();
-    
-    this.initialize_preview_link();
-  }
-  
-  Danbooru.WikiPage.initialize_preview_link = function() {
-    $("#c-wiki-pages #preview a[name=toggle-preview]").click(function(e) {
-      $("#preview").toggle();
-      $("#dtext-help").toggle();
-      e.preventDefault();
-    });
-    
-    $("#c-wiki-pages input[value=Preview]").click(function(e) {
-      e.preventDefault();
-      $.ajax({
-        type: "post",
-        url: "/dtext_preview",
-        data: {
-          body: $("#wiki_page_body").val()
-        },
-        success: function(data) {
-          $("#dtext-help").hide();
-          $("#preview").show();
-          $("#preview .content").html(data);
-        }
-      });
-    });
-  }
-})();
-
-$(document).ready(function() {
-  Danbooru.WikiPage.initialize_all();
-});
+