[Feature] Save custom button layouts between runs

[hunter1026]

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Expected:

custom control layout would save

Actual:

when leaving a game (core) and coming back to it, after moving the buttons around to where i want them, the custom control layout has reset back to default.

Reproduce:

1. change control layout
2. leave the game
3. go back to that same game

NOTES

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APP VERSION

APP SOURCE

INSTALLED BY

PLATFORM

iOS

iOS/tvOS VERSION

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[JoeMatt]

There's a few reasons this was a beta feature and why I don't save layouts between runs.

I'll have to fix the following.

• Add a reset method in case layout gets corrupted
• Save layout per screen size and orientation to avoid device upgrades or cross installs to clobber the layout off the screen, etc.