Added support for alternate controls

[CreeperMario]

• See https://github.com/dimok789/homebrew_launcher/pull/34 for more information.
• In addition to this, when using a Wii Remote, the 1 and 2 buttons can also be used to scroll, because when in DPAD mode, the DPAD buttons are used to move the cursor, and as such cannot be used to scroll.
• Fixed the "Back" and "Random" buttons so that they respond to Wii Remotes as well as the GamePad.
• Scrolling can be performed using the Nunchuk (if connected) or the Wii U Pro Controller's analogue sticks.

(I apologise in advance if there are any formatting anomalies within the sources, the diffs show some funky things).

[vgmoose]

Thanks! I know this is something people have been asking about for a while.

I have been neglecting hbas as of late, but would like to get that 2.0 out.... eventually. Looks like Nintendo just released 5.5.2 so stranger things have happened!