Fixes issue 270

app/assets/javascripts/post_flags.js

@@ -3,7 +3,7 @@
   
   Danbooru.PostFlag.initialize_all = function() {
     if ($("#c-posts") && $("#a-show")) {
-      this.initialize_flag();
+     this.initialize_flag();
       this.hide_or_show_flag_link();
     }
   }
@@ -30,6 +30,10 @@
       }
     });
 
+    $('#flag-dialog form').submit(function() {
+      $('#flag-dialog').dialog('close');
+    });
+
     $("#flag").click(function(e) {
       e.preventDefault();
       $("#flag-dialog").dialog("open");