rem: if (event->xkey.keycode == panel->retKey) {
add: if (event->xkey.keycode == panel->retKey && panel->defBtn) {
context: handleKeyPress2(XEvent *event, void *clientData){    WMInputPanel *panel = (WMInputPanel*)clientData;    if (event->xkey.keycode == panel->retKey) {	WMPerformButtonClick(panel->defBtn);    }}