Fixed mouse click behaviour bug

Author: Yujonpradhananga

src/mango.c

@@ -1991,6 +1991,9 @@ buttonpress(struct wl_listener *listener, void *data) {
 		if (locked)
 			break;
 
+		/* Invalidate modifier-only bindings on mouse click */
+		mod_key_used = true;
+
 		xytonode(cursor->x, cursor->y, &surface, NULL, NULL, NULL, NULL);
 		if (toplevel_from_wlr_surface(surface, &c, &l) >= 0) {
 			if (c && c->scene->node.enabled &&