Enhance extra_cards

[ajagnanan]

Is your feature request related to a problem? Please describe.
I'd like the ability to add extra_cards before and after the generated cards

Describe the solution you'd like
Enhance the extra_cards option to be extra_cards_before and extra_cards_after which places custom cards before and after the generated cards

Describe alternatives you've considered
Currently there isn't a way to place cards after

Additional context
Discussion topic: #59

[DigiLive]

Note: The Home view has the same, but it's called quick_access_cards and extra_cards.
https://github.com/AalianKhan/mushroom-strategy/blob/e6cefd0ddab861755e5c0b61ed98d8843a047fe4/src/views/HomeView.js#L78-L92