Updating extensions for iOS 15/16

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SBHIconGridSizeClassSizes

SBHIconGridSizeClassSizes in all arguments of methods and functions is now passed via pointer, instead of being passed as a raw struct.

You can write code that supports both versions like so:

@interface SBIconListGridLayoutConfiguration : NSObject
-(void)setIconGridSizeClassSizes:(SBHIconGridSizeClassSizes)sizes;
@end

@interface i15SBIconListGridLayoutConfiguration : NSObject
-(void)setIconGridSizeClassSizes:(SBHIconGridSizeClassSizes *)sizes;
@end

...

SBHIconGridSizeClassSizes sizes = { .small = { .columns = (short)widgetWidth(2, loadoutValueColumns), .rows = 2 },
                                    .medium = { .columns = (short)widgetWidth(4, loadoutValueColumns), .rows = 2 },
                                    .large = { .columns = (short)widgetWidth(4, loadoutValueColumns), .rows = 6 },
                                    .extralarge = { .columns = (short)widgetWidth(4, loadoutValueColumns), .rows = 6 } };

if (@available(iOS 15, *))
    // Cast to the iOS 15 Interface so ARC allows us to compile this
    [(i15SBIconListGridLayoutConfiguration *)config setIconGridSizeClassSizes:&sizes];
else
    [config setIconGridSizeClassSizes:sizes];