[#1085] add a 2 in 1 fav&boost button

[sm32d]

Created another button that does the job of both favourite and boost following:

1. Neither liked nor boosted - add both
2. Either liked or boosted - preserve existing and add other
3. Both liked and boosted - remove both

[Fastidious]

Can you link an instance using this, to see how it looks?

[sm32d]

Can you link an instance using this, to see how it looks?

I'm not sure of any instance using this, but you can try in your local.