Balance improvements and more

This update includes:

• Increased XP for the levels and some badges, extra XP for Night levels, meaning the game is now easier and less grinding is needed for these who had to grind

• Improved interfaces and controls, including wave hints, tower sell confirmation, proper right mouse button use, build site highllighting etc.

• Bug fixes, including reduced loading time, crash on summoned units info and othrs.

Merry Christmas and happy New Year! 🎄