A few DLC bug fixes

Fixed issue where it was sometimes possible to play Dice Dice Dice with too little money
Fixed issue where Dice Dice Dice was not playable if the player lacked the funds for other saloon offers above 1000 dollars
Fixed diamond offer in The Heat is On never appearing
Removed line from deep mode level excerpt about diamonds found
Fixed issue where campaign button stays selected after reopening custom multiplayer game menu
Fixed issue where deepmode check to see if you were able to build a pipe assumed you are always drilling through rock
Fixed issue where the game would sometimes freeze if a pipe was built directly from a refinery