Add nesting/folders to groups on mobile

[KoYWn]

My second idea for groups on mobile is to add nesting, where if I have multiple groups pertaining to say Anime, I can put those that I do not necessarily want clogging up my main view, beacuse I don't use them very often but still want to have these groups, into a group collection on the same level as when one creates a new group, with the ability to shift groups in and out, like how folders and files behave in file systems, with ideally infinite (or say up to 10/5) layers being the maximum. 

[Jon]

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