Tab selection works differently in world creation/statistics screens versus friends menu

Relates to MC-259673.

The friends/other players menu uses a tabber system to view multiple different screens in one. These behave unexpectedly different to other “tab” systems in the game, both those seen in game menus (creating worlds, statistics) and in inventory screens (Creative inventory, recipe book, advancements).

Notably, rather than using a proper tabber system, bistable buttons are used to enable one screen or the other. The fixing of MC-259673 appears to set a precedent that this design is undesirable.

To fix, the tabs would be represented by tab graphics, rather than with buttons.