Show flutter height data in the HUD

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If there is usable space in the HUD, we should consider dedicating a spot (or using misc. data) to display data related to the last performed flutter.

Things we could show:

• how much height was gained/lost
• the amount of frames between B button release and re-press
• the frame of the jump or the yoshi state that the flutter was initiated on

Would we want to use a menu flag to activate/deactivate?
Could even do something wild like change yoshi colour to green when height gained, red when lost etc.