Small fix

app/src/main/java/eu/faircode/email/Core.java

@@ -2066,7 +2066,7 @@ class Core {
             throw new IllegalArgumentException("Local attachment not found");
         if (attachment.subsequence != null)
             throw new IllegalArgumentException("Download of sub attachment");
-        if (attachment.available)
+        if (attachment.available && !delete)
             return;
         if (message.uid == null)
             throw new IllegalArgumentException("Attachment/message uid missing");

app/src/main/java/eu/faircode/email/EntityOperation.java

@@ -525,8 +525,11 @@ public class EntityOperation {
                     }
                 }
 */
-            } else if (ATTACHMENT.equals(name))
-                db.attachment().setProgress(jargs.getLong(0), 0);
+            } else if (ATTACHMENT.equals(name)) {
+                boolean delete = jargs.optBoolean(1, false);
+                if (!delete)
+                    db.attachment().setProgress(jargs.getLong(0), 0);
+            }
 
             queue(context, message.account, message.folder, message.id, name, jargs);