Re-enable form fields if ajax:aborted:file handler returns false.

Author: JangoSteve

src/rails.js

@@ -366,8 +366,15 @@
 
       if (remote) {
         if (nonBlankFileInputs) {
+          // slight timeout so that the submit button gets properly serialized
+          // (make it easy for event handler to serialize form without disabled values)
           setTimeout(function(){ rails.disableFormElements(form); }, 13);
-          return rails.fire(form, 'ajax:aborted:file', [nonBlankFileInputs]);
+          var aborted = rails.fire(form, 'ajax:aborted:file', [nonBlankFileInputs]);
+
+          // re-enable form elements if event bindings return false (canceling normal form submission)
+          if (!aborted) { setTimeout(function(){ rails.enableFormElements(form); }, 13); }
+
+          return aborted;
         }
 
         // If browser does not support submit bubbling, then this live-binding will be called before direct