File presentation is broken on iPadOS

[frenzibyte]

https://discord.com/channels/188630481301012481/589331078574112768/1324993341309452371

[frenzibyte]

@peppy fixing this one is going to be complicated. iPadOS shows file presentation dialog in a popover-like structure, and the rectangle gameView.Bounds specified in

osu-framework/osu.Framework.iOS/IOSFilePresenter.cs

Line 38 in b3dfdba

return documentInteraction.PresentOptionsMenu(gameView.Bounds, gameView, true);

represents a rectangle for which the popover should be pointing at, and since I'm choosing the entire game's bounds as the rectangle, the popover appears outside the game and cannot be seen basically.

A simple fix would be to throw an arbitrary rectangle that makes the popover appears on one of the corners of the game, i.e. CGRect.Empty, which displays the popover in the top-left corner:

We can also make this more robust by receiving the rectangle of the "export" game notification and make the popover point from it, if that sounds good (will require changes to make the notification not dismiss as well, otherwise it'll look weird).

Waiting on your call before proceeding with a fix.