Contracts Window + v9.1

• Contracts and parameters update their states properly
• Contract and parameter titles update when they should
• Window positioning is fixed
  • When dragging the window around the screen
  • When loading a file where the last saved window position is off the screen
• Avoid null reference errors when accepting contracts immediately after installing the mod
  • Only applies when the mod has never been installed for a save file before
• Fix some potential bugs that caused the contract window to be blank