Move de-classifying to core

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

@@ -998,6 +998,10 @@ class Core {
         if (folder.id.equals(target.id))
             throw new IllegalArgumentException("self");
 
+        // De-classify
+        for (EntityMessage message : messages)
+            MessageClassifier.classify(message, false, context);
+
         IMAPFolder itarget = (IMAPFolder) istore.getFolder(target.name);
 
         // Get source messages

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

@@ -229,9 +229,6 @@ public class EntityOperation {
                             db.rule().deleteRule(rule.id);
                 }
 
-                if (message.content)
-                    MessageClassifier.classify(message, false, context);
-
                 // Create copy without uid in target folder
                 // Message with same msgid can be in archive
                 if (message.uid != null &&