Small fixes and Quality of Life updates

This update brings the Godot Engine version to 4.3 and introduces the following fixes:

• The start button is disabled if no data for starting a raffle is saved. This should make it more obvious that users need to save the user data before beginning
• Fixed a bug that prevented starting of raffles when no users were on the ignore list
• The Input boxes can now be exited by pressing tab and will move to the next ui element
• The content of the input boxes can now be hidden by pressing the "hide data" button next to it
• The dust cloud in the middle of the arena will now spawn at a more fitting time