Add support for useractions and toggle masks with hotkey

[AnKingMed]

I would recommend adding this to the note type. It makes it so useraction1 on iOS toggles the masks or using "h" (also the key for hint hotkeys which currently will allow for toggling the masks)

https://github.com/AnKing-VIP/AnKing-Note-Types/blob/master/additional%20scripts/Toggle%20IO%20Enhanced%20Masks%20on%20Mobile.html

[glutanimate]

That looks like a nice improvement, thanks!