Prevent removal of messages when flagging

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

@@ -745,7 +745,8 @@ class Core {
                                 // Cleanup messages
                                 if (MessageHelper.isRemoved(ex)) {
                                     if (message != null &&
-                                            !EntityOperation.SEEN.equals(op.name))
+                                            !EntityOperation.SEEN.equals(op.name) &&
+                                            !EntityOperation.FLAG.equals(op.name))
                                         db.message().deleteMessage(message.id);
                                 }
 

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

@@ -729,7 +729,9 @@ public class EntityOperation {
         if (SYNC.equals(name))
             db.folder().setFolderSyncState(folder, null);
 
-        if (fetch && message != null && !SEEN.equals(name)) {
+        if (fetch && message != null &&
+                !SEEN.equals(name) &&
+                !FLAG.equals(name)) {
             EntityMessage m = db.message().getMessage(message);
             if (m == null || m.uid == null)
                 return;