SwitchBackend analog offset

[ZeroniaFX]

Seems all stick inputs are shifted about 1 left, 1 up. This also affects the stick in neutral.

For example:

• MY Walk leftwards minimum = 25.
• MY Walk rightwards minimum = 26.

Not the biggest issue since I can round up, but the issue exists.

Example 2:

• C-UpRight = Up Smash/Tilt.
• C-UpLeft = Upward angled Forward Smash/Tilt.

This can easily be worked around with modifiers, but the issue exists.

...

Also, because the stick cannot fully progress from Neutral to Up, scrolling up is not possible in certain Switch System Settings.

[JonnyHaystack]

Possibly related #88