Performance fixes and stability improvements

New Features:
> New question type, "revealing clues". In the constructor, you'll be able to set a list of gradually appearing clues that increasingly hint to the correct answer. The more hints are revealed, the fewer points the player will earn
> Small icons indicating the question type and answer have been added in the constructor (text - music - audio - video)
> You can now adjust the text display speed on the board (the audio settings tab)
> After the game ends, buttons "open pack in Steam Workshop" (if available) and "finish game" appear. Some players had been confused about what to do after the game ends
> After the end of a multiple-choice question, the answering player is randomly selected from those who gave the correct answer
> Player names and answers now have character limits

Fixes:
> Question price can no longer be less than 0
> The player score panel now displays all players correctly (previously limited to 8 players)
> Issues with the game freezing during round changes/point change have been fixed
> The cooldown button calculator now affects the player's answer cooldown as well
> Answers given in "auction" or "multiple choice" questions now count towards end-of-game statistics
> The maximum answer time limit has been increased to 60 seconds (previously 30 seconds)
> The player answer field is now correctly cleared after the player gives their answer
> Pack loading is now properly divided into tabs, and loading spins only where packs haven't fully loaded yet
> Wizard avatars have been fixed, their hats are no longer partially transparent when the camera is far away
> The game no longer breaks if a floating point bid is placed during an auction question