### Feature request

`customButtonsOnHover` fixes a lot of issues with drag and `pointer` styles, but my app currently uses `hidden-inset` so this setting changes the position of the buttons. I'd suggest `customButtonsOnHover` either be an option outside of `titleBarStyle` that respects `titleBarStyle`s values ('hiddenInset' or `hidden') or the addition of a `customButtonsOnHoverInset`.

As a separate note, the docs for `customButtonsOnHover` currently specify it's a Boolean type, but it's a string value.
shell/browser/native_window.h
namespace content {
struct NativeWebKeyboardEvent;
}
namespace gfx {
class Image;
class Point;
class Rect;
class RectF;
class Size;
}  
namespace gin_helper {
class Dictionary;
class PersistentDictionary;
}  
namespace electron {
class ElectronMenuModel;