Fix "Importing..." message does not hide on error (#1490422)

CHANGELOG

@@ -11,6 +11,7 @@ CHANGELOG Roundcube Webmail
 - Plugin API: Add special onload() method to execute plugin actions before startup (session and GUI initialization)
 - Implemented UI element to jump to specified page of the messages list (#1485235)
 - Fix so unrecognized TNEF attachments are displayed on the list of attachments (#1490351)
+- Fix "Importing..." message does not hide on error (#1490422)
 
 RELEASE 1.1.2
 -------------

program/js/app.js

@@ -1268,7 +1268,7 @@ function rcube_webmail()
 
         $('input[name="_unlock"]', form).val(importlock);
 
-        if (!(flag = this.upload_file(form, 'import'))) {
+        if (!(flag = this.upload_file(form, 'import', importlock))) {
           this.set_busy(false, null, importlock);
           if (flag !== false)
             alert(this.get_label('selectimportfile'));
@@ -4179,7 +4179,7 @@ function rcube_webmail()
   };
 
   // upload (attachment) file
-  this.upload_file = function(form, action)
+  this.upload_file = function(form, action, lock)
   {
     if (!form)
       return;
@@ -4221,6 +4221,9 @@ function rcube_webmail()
           if (!content.match(/display_message/))
             ref.display_message(ref.get_label('fileuploaderror'), 'error');
           ref.remove_from_attachment_list(e.data.ts);
+
+          if (lock)
+            ref.set_busy(false, null, lock);
         }
         // Opera hack: handle double onload
         if (bw.opera)