fix #1047145: Made TaskLink fields mandatory (just like in ActivityLink)

entity/TaskLink_entity/TaskLink_entity.aod

@@ -22,6 +22,7 @@
       <name>OBJECT_TYPE</name>
       <title>{$OBJECTLINK_TYPE}</title>
       <consumer>Contexts</consumer>
+      <mandatory v="true" />
       <displayValueProcess>%aditoprj%/entity/TaskLink_entity/entityfields/object_type/displayValueProcess.js</displayValueProcess>
     </entityField>
     <entityField>
@@ -29,6 +30,7 @@
       <title>{$OBJECTLINK_OBJECT}</title>
       <consumer>Objects</consumer>
       <linkedContextProcess>%aditoprj%/entity/TaskLink_entity/entityfields/object_rowid/linkedContextProcess.js</linkedContextProcess>
+      <mandatory v="true" />
       <displayValueProcess>%aditoprj%/entity/TaskLink_entity/entityfields/object_rowid/displayValueProcess.js</displayValueProcess>
     </entityField>
     <entityProvider>