how to resize tab group "labels" section from "elements" in App Designer

Hello,

is there any way to auto resize the portion of screen dedicated to tab group labels to fit the text of the labels in the tab group in App Designer?

As you can see in this picture, tab names are truncated, I want to move the separator more to the right but it seems this is not possible from the App Designer... Is there any "coding way" to achieve that result?

Thanks