add hover implementation to graph_objs.Indicator

Following the hovering tutorial for Dash Tooltips, I noticed that the described hovering functionality present in graph_objs.Scatter is not present in graph_objs.Indicator (I get Invalid property specified errors for hoverinfo, and the callback does not fire)

I respectfully request this functionality be extended to the Indicator and thank you in advance for your consideration.

For context behind my request, I am building a dashboard for my workplace that will be used internally and will auto-configure based on the job that is running. The user being able to hover over the graph and view extra context as to what it is displaying would be highly beneficial.

Jules

Beginne damit, das für graph_objs.Scatter beschriebene Hover-Verhalten mit dem Objekt graph_objs.Indicator zu vergleichen, wobei das Dash Tooltips tutorial als erwartetes Verhalten dient. Bestätige den aktuellen Fehler „Invalid property specified“ und das Callback-Verhalten und überprüfe anschließend, dass Indicator den angeforderten Hover-Kontext unterstützt, ohne die bestehende Validierung von Graph-Objekten zu beeinträchtigen.