Enigma: Fix handling of messages with nested PGP encrypted parts (#5634)

CHANGELOG

@@ -2,6 +2,7 @@ CHANGELOG Roundcube Webmail
 ===========================
 
 - Enigma: Always use detached signatures (#5624)
+- Enigma: Fix handling of messages with nested PGP encrypted parts (#5634)
 - Fix autocomplete popup closing with click outside the input, don't handle Tab key as Enter (#5606)
 - Fix jsdeps.json synchronization on update, warn about missing requirements of install-jsdeps.sh (#5598)
 - Fix missing thread expand icon on search result in widescreen mode (#5613)

plugins/enigma/lib/enigma_engine.php

@@ -426,11 +426,6 @@ class enigma_engine
     {
         $part = $p['structure'];
 
-        // exit, if we're already inside a decrypted message
-        if (in_array($part->mime_id, $this->encrypted_parts)) {
-            return;
-        }
-
         // Get message body from IMAP server
         if ($body === null) {
             $body = $this->get_part_body($p['object'], $part);