Merge branch '2021.0_1068848_FilterExtensionKommunikation' into '2021.0'

[Projekt: Entwicklung - xRM][TicketNr.: 1068848][Neues Filter-Extension-Set...

See merge request xrm/basic!622

entity/Communication_entity/Communication_entity.aod

@@ -307,6 +307,7 @@ Usually this is used for filtering COMMUNICATION-entries by a specified contact
         <dbRecordFieldMapping>
           <name>MEDIUM_ID.value</name>
           <recordfield>COMMUNICATION.MEDIUM_ID</recordfield>
+          <isFilterable v="true" />
         </dbRecordFieldMapping>
         <dbRecordFieldMapping>
           <name>COMMUNICATIONID.value</name>