changelog update

<?xml version="1.0" encoding="utf-8"?>

<changelog>

    <release version="4.505" versioncode="18005" >

        <change>Major performance improvements in folder lists</change>

        <change>Catalan, Chinese and Russian translation updates</change>

        <change>Several bugfixes</change>

    </release>

    <release version="4.503" versioncode="18003" >

        <change>Added additional shortcuts to the Folder list</change>

        <change>Tweaks to checkboxes and color chip display</change>