Allow keywords for read only folders

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

@@ -1945,7 +1945,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
                     boolean trash = (move || outbox || debug ||
                             message.accountProtocol == EntityAccount.TYPE_POP);
                     boolean inbox = (move && hasInbox && (inArchive || inTrash || inJunk));
-                    boolean keywords = (!message.folderReadOnly && message.uid != null &&
+                    boolean keywords = (message.uid != null &&
                             message.accountProtocol == EntityAccount.TYPE_IMAP);
                     boolean labels = (data.isGmail && move && !inTrash && !inJunk && !outbox);
                     boolean seen = (message.uid != null ||
@@ -4738,7 +4738,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
             popupMenu.getMenu().findItem(R.id.menu_create_rule).setVisible(!message.folderReadOnly);
 
             popupMenu.getMenu().findItem(R.id.menu_manage_keywords)
-                    .setEnabled(message.uid != null && !message.folderReadOnly)
+                    .setEnabled(message.uid != null)
                     .setVisible(message.accountProtocol == EntityAccount.TYPE_IMAP);
 
             popupMenu.getMenu().findItem(R.id.menu_search_in_text).setEnabled(message.content && !full);

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

@@ -921,14 +921,9 @@ class Core {
         if (message.uid == null)
             throw new IllegalArgumentException("keyword/uid");
 
-        if (!ifolder.getPermanentFlags().contains(Flags.Flag.USER)) {
-            if (MessageHelper.FLAG_FORWARDED.equals(keyword) && false) {
-                JSONArray janswered = new JSONArray();
-                janswered.put(true);
-                onAnswered(context, janswered, folder, message, ifolder);
-            }
+        if (folder.read_only ||
+                !ifolder.getPermanentFlags().contains(Flags.Flag.USER))
             return;
-        }
 
         Message imessage = ifolder.getMessageByUID(message.uid);
         if (imessage == null)
@@ -3995,6 +3990,7 @@ class Core {
             }
 
             if (!Helper.equal(message.keywords, keywords) &&
+                    !folder.read_only &&
                     ifolder.getPermanentFlags().contains(Flags.Flag.USER)) {
                 update = true;
                 message.keywords = keywords;