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As mentioned on the other thread, I will raise this thread as well to our team working on this so that you can be updated as soon as there are any news in regards to this which would allow us to add custom CSS to the widget and re-style its fields.
Once possible, it would be easy to make the modifications you are after.
Custom CSS has been implemented.
You can use the .label_row class to define the width of the labels vs the slider, for example:
Please try it and let us know.