Zoom level not remembered in Explain model widget

When setting a Zoom level inside "Explain Model" widget, graph is correctly scaled, but, when a different target class is selected, the graph is displayed at default zoom level, even if the zoom slider is set on a different value; moving it again, restores the desired zoom level.

Start by locating the Explain Model widget and trace how the zoom slider value is applied when a different target class is selected. Reproduce the reset with the slider, then verify that changing target classes preserves the selected zoom level and that the graph remains correctly scaled.

Written by the indexing model from the issue text.