Just paste this code in an empty xml file save it and include it in the user defined extension section as "Navigator"

<?xml version="1.0" encoding="windows-1252" ?>

<navigator RESOURCE_FILE="oracle.dbtools.raptor.navigator.OracleNavigatorResource"

 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

 xsi:noNamespaceSchemaLocation="navigator.xsd">

<objectType connType="Oracle" id="JOB" weight="100.0" includesSyns="true">

<folder>

<icon RSKEY="TABLE_FOLDER_ICON"/>

<label RSKEY="Jobs"/>

<queries>

<query minversion="8">

<sql constrained="true">

<![CDATA[SELECT job,what,broken,job||' * '||substr(what,0,20) what_short FROM ALL_JOBS WHERE SCHEMA_USER=:SCHEMA]]>

</sql>

</query>

<columns>

 <column filterable="true" sortable="true" id="JOB">

  <colName>

   <![CDATA[JOB]]>

  </colName>

 </column>

 <column filterable="false" sortable="true" id="NAME">

  <colName>

   <![CDATA[WHAT_SHORT]]>

  </colName>

 </column>

 <column filterable="true" sortable="true" id="WHAT">

  <colName>

   <![CDATA[WHAT]]>

  </colName>

 </column>

 <column filterable="true" sortable="true" id="BROKEN">

  <colName>

   <![CDATA[BROKEN]]>

  </colName>

 </column> 

</columns>

</queries>

</folder>

<node>

 <icon RSKEY="OracleIcons.TABLE"/>

</node>

</objectType>

</navigator>