Describe the bug

On the windows installer, you cannot click Back once you get to the 'ready to install' page of the wizard.
You can click Back on the other pages and it will take you back.

I understand that go-msi is being used and of course the WiX Toolset so bug may be in one of those projects.

gh_1.0.0_windows_amd64.msi

https://github.com/cli/cli/releases/tag/v1.0.0

I have tested on Windows 10 machine.

Steps to reproduce the behavior

1. Run .msi installer wizard
2. Click Next on first screen
3. Agree to license agreement and click Next
4. Choose install location and click Next
5. On 'ready to install' page, click Back (nothing happens).

Expected vs actual behavior

You should be able to click Back on the 'ready to install' page and it should go to previous screen. You would want to do this for example, to change the install location.