multiplying events

[bmaranville]

Description

1. I want to listen for a click event on one plotly plot, then use that to update a second plotly plot.
2. I expect the on('plotly_click', ...) handler to fire exactly once for each click
3. Instead, the handler fires 3x on the first click, then 4x on the second click, then 5x ... etc.

Here is code to reproduce the issue:

from nicegui import ui
import plotly.graph_objects as go

fig = go.Figure(go.Scatter(x=[0,1,2,3,4], y=[3,5,2,7,8]))
plot = ui.plotly(fig)

fig2 = go.Figure(go.Scatter(x=[0,1,2,3,4], y=[2,5,1,2,1]))
plot2 = ui.plotly(fig2)

def click_handler(ev):
    plot2.update()
    print(ev.args)

plot.on("plotly_click", click_handler)
ui.run()

[platinops]

I believe this same bug also causes #2435