Poor chart performance when dragging the panel

[mattrunyon]

Description

Charts resubscribe to the model when the panel is dragged to be moved. This can cause lockup and a lag spike if you are dragging a chart with a lot of points.

Steps to reproduce

1. Run this Python

   from deephaven import empty_table
   from deephaven.plot.figure import Figure, PlotStyle
   
   import datetime
   from deephaven import time_table
   t = time_table("PT1S", datetime.datetime.now() - datetime.timedelta(seconds=150000)).update("Y=ii")
   
   plot_singles = (
       Figure()
       .plot_xy(
           series_name="Y",
           t=t,
           x="Timestamp",
           y="Y",
       )
       .axes(plot_style=PlotStyle.SCATTER)
       .show()
   )
   

2. Click the button to continue and disable downsampling
3. After the plot has loaded, drag the panel with the plot to move it to a different position

Expected results

4. Snappy movement

Actual results

4. UI freezes for 1-2 seconds at least shortly after the drag starts

Versions

Engine Version: 0.35.0-SNAPSHOT Web UI Version: 0.75.1 Java Version: 17.0.10 Barrage Version: 0.6.0 Browser Name: Chrome 124 OS Name: Linux