steps to reproduce:
- download xwiki-jetty-mysql
- start it
- click on "Install on farm"
- resolve the merging issues
- at the end, you will see no "Continue" button, even if the wizard has done importing.
In order to get the continue button, simply press F5 to refresh the page. The Cancel and Skip button will disappear, and the Continue button will appear.
This happens only on XEM, it works on XE