Compare stored time against sync time

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

@@ -2617,7 +2617,7 @@ class Core {
                             EntityOperation.queue(context, message, EntityOperation.MOVE, trash.id);
                 }
             } else {
-                int old = db.message().deleteMessagesBefore(folder.id, keep_time, delete_unseen);
+                int old = db.message().deleteMessagesBefore(folder.id, sync_time, keep_time, delete_unseen);
                 Log.i(folder.name + " local old=" + old);
             }
 

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

@@ -862,11 +862,11 @@ public interface DaoMessage {
 
     @Query("DELETE FROM message" +
             " WHERE folder = :folder" +
-            " AND received < :before" +
+            " AND received < :keep_time" +
             " AND NOT uid IS NULL" +
             " AND (ui_seen OR :unseen)" +
             " AND NOT ui_flagged" +
-            " AND stored < :before" + // moved, browsed
+            " AND stored < :sync_time" + // moved, browsed
             " AND ui_snoozed IS NULL")
-    int deleteMessagesBefore(long folder, long before, boolean unseen);
+    int deleteMessagesBefore(long folder, long sync_time, long keep_time, boolean unseen);
 }