Minor fixes

[octachrome]

Fixed the pins example app, and clarified the name property in metadata.json.

The pins example app had three issues:

• The app raised an exception when you selected a hexpansion port
• The graphical indication of the active hexpansion port was off by one
• There was no way to go back to the hexpansion port selection menu

Tested on badge with the latest firmware.

[npentrel]

Thanks!