Fix merge error that disabled contact drag'n'drop

Thomas Bruederli

2014-08-19 fc52af24f1418d6590a2d37a0d8cc31b123e38f6

 plugins/show_additional_headers/package.xml

@@ -15,10 +15,10 @@
      <email>roundcube@gmail.com</email>
      <active>yes</active>
   </lead>
   <date>2011-11-21</date>
   <date>2012-04-23</date>
   <version>
      <release>1.1</release>
      <api>1.1</api>
      <release>2.0</release>
      <api>2.0</api>
   </version>
   <stability>
      <release>stable</release>