Fix title synchronization in PerspectiveWidget

[cyril-acquah80]

The perspective-config-update event is not triggered when the title is changed and that is the cause of the issue. The changes in this PR listens to title change events and dispatches config update event.

https://github.com/finos/perspective/blob/master/packages/perspective-jupyterlab/src/js/view.js#L59

this.luminoWidget.viewer.addEventListener(
    "perspective-config-update",
    this._synchronize_state
);

Fixes #2131

perspective-google-chrome-2023-09-04-09-34-38_6gh1rr8d.mp4

[cyril-acquah80]

Please @texodus / @timkpaine, can you kindly review my PR