Change the gamepad defaults to flow better in Simple mode

When Simple mode became default, it stopped making sense that the gamepad defaults to jump/spin on shoulder buttons. It made sense when you needed to control the camera with both sticks. However, the camera behavior of Simple mode has made the scheme very awkward (1:22).

We should move the character actions to the face buttons. Off the top of my head, this might look like:

• A - Jump
• B/X - Spin
• Y - ???
• L Button - Prev Weapon
• R Button - Next Weapon
• L Trigger - Shoot Normal
• R Trigger - Shoot Weapons

It's not optimized for ringslinger, but it looks like we're prioritizing Co-op anyway.

Potential solutions, in order of effort. I think any of these are better than current:

• Change the button definitions, done.
• Change the button definitions, use config versioning to replace config'd gamepad buttons if they are same as default.
• Toggle different controller configs for Legacy/Standard/Simple. Maybe save/load different config profiles for each style.
• The above, plus have profiles for ringslinger modes.