Fix slider update on readout text change

[jtpio]

Description

In ipywidgets 7 it was possible to edit the readout of a slider, press Enter and the position of the slider would be updated according to the new value:

slider-update-7.mp4

This does not seem possible anymore with the latest ipywidgets release (8.0.1 at the time of writing).

Changes

Remove { updated_view: this } from the options when the change comes from updating the text.

Before

slider-update.mp4

After

slider-update-fixed.mp4

[github-actions]

👈 Launch a binder notebook on branch jtpio/ipywidgets/fix-slider

[jtpio]

#2712 (comment) might give some context on the origin of updated_view:

Changed some of the function signatures to accept the updated_view attribute. This is now used to validate whether the slider should update its value when the updateSliderValue callback is invoked. This now enables smooth animations with no lags

Dropping it when the update comes from handleTextChange like in this PR appears to be fine, as the update is triggered when pressing Enter.

[jasongrout]

Thanks!