Update 0.7.23

[h3]Bugfixes[/h3]

• Fixed an issue where the Rhino Whirlwind technology would not work.
  
• Fixed an issue where sometimes the game would not advance to the next round after all units on one side died.
  
• Corrected the shooting angle range of the 4 main guns of the War Factory to avoid the situation that sometimes only 1 main gun is attacking.
  
• Fixed some other display bugs.