Small improvement

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

@@ -445,7 +445,10 @@ class Core {
                 }
             }
             ifolder.expunge();
-        } else {
+        } else
+            try {
+                db.beginTransaction();
+
                 // Cross account move
                 if (autoread) {
                     Log.i(folder.name + " queuing SEEN id=" + message.id);
@@ -454,6 +457,10 @@ class Core {
 
                 Log.i(folder.name + " queuing DELETE id=" + message.id);
                 EntityOperation.queue(context, db, message, EntityOperation.DELETE);
+
+                db.setTransactionSuccessful();
+            } finally {
+                db.endTransaction();
             }
     }