622590179b
During development of the OSK updates, this._modifiers turned from an array into a Set(), but this location missed switching from length() to size() to get the cardinality of the contained values. As a result, the OSK misbehaved and resorted for key event forwarding for impossible keyvals, instead of handing them directly to the IM. Fixes: https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/5766 Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2445>