preset kind with mail if upload is html or txt

entity/DocumentTemplate_entity/entityfields/kind/valueProcess.js

@@ -15,6 +15,8 @@ if (vars.get("$this.value") == null && vars.get("$field.BINDATA"))
     switch (mimeType)
     {
         case MimeTypes.EML():
+        case MimeTypes.HTML():
+        case MimeTypes.TXT():
         case MimeTypes.MSG():
             kind = $KeywordRegistry.documentTemplateType$mail(); 
             break;