GUI: Add a portrait version of the launcher

[ccawley2011]

In portrait mode, the buttons are moved to the bottom of the screen instead of next to the game list, so that there's more room for the game description to be displayed.

[sev-]

Looks good, however, you also need to make the same changes to the classic theme. It is not inherited. The file is scummclassic/classic_layout.stx

[ccawley2011]

Looks good, however, you also need to make the same changes to the classic theme. It is not inherited. The file is scummclassic/classic_layout.stx

The classic theme already has the buttons underneath the game list, even in landscape mode.

[sev-]

Thanks!