Enable auto decrypt for S/MIME

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

@@ -1580,7 +1580,9 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
 
                     SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
                     boolean auto_decrypt = prefs.getBoolean("auto_decrypt", false);
-                    if (auto_decrypt && EntityMessage.PGP_SIGNENCRYPT.equals(message.encrypt))
+                    if (auto_decrypt &&
+                            (EntityMessage.PGP_SIGNENCRYPT.equals(message.encrypt) ||
+                                    EntityMessage.SMIME_SIGNENCRYPT.equals(message.encrypt)))
                         onActionDecrypt(message, true);
 
                     // Show images

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

@@ -3928,6 +3928,10 @@ public class FragmentMessages extends FragmentBase implements SharedPreferences.
 
                 @Override
                 protected void onExecuted(Bundle args, EntityIdentity identity) {
+                    Boolean auto = args.getBoolean("auto");
+                    if (auto && identity == null)
+                        return;
+
                     Helper.selectKeyAlias(getActivity(), identity == null ? null : identity.sign_key_alias, new Helper.IKeyAlias() {
                         @Override
                         public void onSelected(String alias) {