src/ibusenginesimple: Ignore Super modifier for compose keys

Now IBus receives key events prior to the window manager and needs
to ignore Super modifier since Super key has been already ignored
for compose keys.

BUG=https://gitlab.gnome.org/GNOME/mutter/-/issues/3128

src/ibusenginesimple.c

@@ -2,7 +2,7 @@
 /* vim:set et sts=4: */
 /* ibus - The Input Bus
  * Copyright (C) 2014 Peng Huang <shawn.p.huang@gmail.com>
- * Copyright (C) 2015-2023 Takao Fujiwara <takao.fujiwara1@gmail.com>
+ * Copyright (C) 2015-2024 Takao Fujiwara <takao.fujiwara1@gmail.com>
  * Copyright (C) 2014-2017 Red Hat, Inc.
  *
  * This library is free software; you can redistribute it and/or
@@ -1017,7 +1017,9 @@ ibus_engine_simple_process_key_event (IBusEngine *engine,
          !is_hex_start && !is_hex_end && !is_escape && !is_backspace) ||
         (priv->in_emoji_sequence && !printable_keyval &&
          !is_emoji_start && !is_hex_end && !is_escape && !is_backspace)) {
-        if (modifiers & (IBUS_MOD1_MASK | IBUS_CONTROL_MASK) ||
+        guint no_text_input_mask = IBUS_MOD1_MASK | IBUS_MOD4_MASK \
+                                   | IBUS_CONTROL_MASK | IBUS_SUPER_MASK;
+        if (modifiers & no_text_input_mask ||
             ((priv->in_hex_sequence || priv->in_emoji_sequence) &&
              priv->modifiers_dropped &&
              (keyval == IBUS_KEY_Return ||