Prevent multiple errors from displaying at once.

src/tfd.js

@@ -51,6 +51,7 @@ TFD.prototype._unblock_submit = function(reason) {
 
 TFD.prototype._error = function(msg, extra) {
     var elem = $("<span/>", {
+        addClass: "tfdclerk-error",
         html: "<strong>Error:</strong> " + (extra ? msg + ": " : msg),
         style: "color: #A00;"
     });
@@ -76,6 +77,9 @@ TFD.prototype._error = function(msg, extra) {
             "persists, you can " + contact.prop("outerHTML") + " or " +
             file_bug.prop("outerHTML") + "."
         }));
+
+    if (this.box.find(".tfdclerk-error"))
+        this.box.find(".tfdclerk-error").remove();
     elem.insertAfter(this.box.find("h5"));
     this._block_submit("error");
 };

tfdclerk.js

@@ -50,7 +50,7 @@ var is_tfd_page = function() {
 if (is_tfd_page()) {
     mw.loader.using(dependencies, function() {
 
-    /* Main script starts here */
+/* Main script starts here */
 
 @TFDCLERK_INCLUDE:main.js@
 @TFDCLERK_INCLUDE:util.js@
@@ -58,9 +58,9 @@ if (is_tfd_page()) {
 @TFDCLERK_INCLUDE:tfd_close.js@
 @TFDCLERK_INCLUDE:tfd_relist.js@
 
-    $(TFDClerk.install);
+$(TFDClerk.install);
 
-    /* Main script ends here */
+/* Main script ends here */
 
     });
 }