Add calculated columns from data in analysis flyout

In Spotfire 14.5, the column properties dialog was removed in favor of a new behavior within the data in analysis flyout. Creating calculated columns now requires using the data canvas or menus in the main interface.

It would be nice to have the ability to add calculated columns directly from the Data in analysis flyout, which would streamline wokrflows by keeping all column-related tasks in one place.

This improvement would bring the new flyout experience closer to the efficiency of the former column properties dialog, while aligning with Spotfire's modernized data preparation workflows.