Refactor minigame spectator list code
Refactor minigame spectator list code:
- move it to a shared function so it can be used by all minigames without code duplication (spectator list is now shown on every minigame, not only Connect 4 and Tic Tac Toe)
- better handling of player names: no longer cut off at the 8th char but at a certain width (about 8-10 characters)
- make "Spectators:" translatable
This MR is a follow-up of !1099 (merged)
Edited by terencehill