fix: dx now respects the webgl flag

[jnumainville]

Fixes #612

The current implementation has the following behavior, although note that this will not work fully until deephaven/web-client-ui#2255 is merged

1. If webgl is enabled, nothing happens
2. If webgl is disabled and the webgl chart trace type can be replaced, it will be (such as scattergl -> scatter) and replaced again if reenabled (scatter -> scattergl)
3. If webgl is disabled and the webgl chart trace can't be replaced (such as scatter3d or scattermapbox) the prompt in the image below will appear. Once accepted, the acceptance persists for this specific chart, even if webgl is toggled again.
   Note that disabling and reenabling through the settings without clicking Continue doesn't count as an acceptance, so if the prompt appears, the setting is enabled, then the setting is disabled again, the prompt will still appear.

[mofojed]

Will need package bump but looks okay.