Remove descending mean animation from show CI

[garrettgman]

When the show CI button is clicked, the GUI should proceed straight to showing the CI without animating the mean/median/difference dropping down from the top plot first.

[garrettgman]

For onesampBootGUI() this can be fixed by commenting out bootstrapMoveBarFromDatavp() from handlerShowCI(). Need to check whether this works for all other GUIs as well.