setup: hide advancedCLIWidget if CLI found during setNextPage()
setup: hide advancedCLIWidget if CLI found during setNextPage()

In the previous version, the advanced CLI widget was shown even if the CLI
were detected without any problems.

Tarsnap/tarsnap-gui,shinnok/tarsnap-gui,shinnok/tarsnap-gui,shinnok/tarsnap-gui,Tarsnap/tarsnap-gui,Tarsnap/tarsnap-gui,Tarsnap/tarsnap-gui,shinnok/tarsnap-gui,Tarsnap/tarsnap-gui,shinnok/tarsnap-gui