UI "tour" feature locks eV GUI

Bug report

Summary

A purple dialog box appears to the left of the GUI window, so only the right edge of the dialog box is visible. The dialog box has a "next" button that must be clicked, but this is outside the bounds of the window and cannot be reached. The GUI is now locked. (A workaround: pressing the left arrow key enough times brings up the "skip tour" prompt)

Configuration

I'm using:

Camera: Raspberry Pi camera v2 ? (I'm not sure, but it's probably not relevant)

Motor controller: Sangaboard

Steps to reproduce

Press the right arrow key on any part of the Microscope GUI before the "skip tour" prompt has been shown.

Relevant logs and/or screenshots