want to modify the drop down to select a specific default of text/plain so would i mofify no-current-selected-key="_NA_" to no-current-selected-key="text/plain"
<field name="contentMimeTypeId"> <drop-down no-current-selected-key="_NA_" allow-empty="false"> <entity-options description="${mimeTypeId}" entity-name="MimeType" key-field-name="mimeTypeId"> <entity-order-by field-name="mimeTypeId"/> </entity-options> </drop-down> </field>