Node Editor: show auto-attach status while moving

This was just giving the shortcut to toggle, but not giving the actual
status ("ON"/"OFF").

This was especially confusing in the following scenario:
- Alt-drag a node (to detach links)
- try to drop on a link (with Alt still held down) was not working
because the modal keymap would have actually toggled auto-attach to OFF

Pull Request: https://projects.blender.org/blender/blender/pulls/111739

source/blender/editors/transform/transform_mode_translate.cc

@@ -316,8 +316,11 @@ static void headerTranslation(TransInfo *t, const float vec[3], char str[UI_MAX_
       char str_attach_km[64];
       WM_modalkeymap_items_to_string(
           t->keymap, TFM_MODAL_NODE_ATTACH_OFF, true, str_attach_km, sizeof(str_attach_km));
-      ofs += BLI_snprintf_rlen(
-          str + ofs, UI_MAX_DRAW_STR - ofs, TIP_(", %s: Toggle auto-attach"), str_attach_km);
+      ofs += BLI_snprintf_rlen(str + ofs,
+                               UI_MAX_DRAW_STR - ofs,
+                               TIP_(", %s: Toggle auto-attach (%s)"),
+                               str_attach_km,
+                               WM_bool_as_string((t->modifiers & MOD_NODE_ATTACH) != 0));
     }
     else {
       if (t->flag & T_2D_EDIT) {