Small update to CTE release #3

We are releasing a quick update to CTE release #3 to address a few important issues... The flashing and missing terrain in Depot and AI settings not actually being loaded/used.

Thanks to everyone helping to find these issues and bring them to our attention.

Here are the detailed changes:
`* Fixed MicroT1 Tall base texture issue
* Fixed issues with Depot landscape that were introduced in latest build
* Removed holiday decorations from the RR
* udpated GBGameMode
* fixed difficulty setting not being parsed correctly when applied via ops board
Thanks goes out to Bus for leading me to discover this issue.
* changed initial Difficulty value to -1 to ensure it will change on first call of SetDifficulty() no matter what.
* changed default value used to read commend line value of Difficulty from 0 to 2 in case custom difficulty is completed messed up.
* updated GBAISettings
* ensured SuppressionRecoveryRate & OnTargetThreshold were being read from config and applied to AI.
* enabled logging to dump current AI settings to log when ever AI difficulty is set.
* udpated AGBCharacter::AddItem() to ensure added items NextInvItem was set to nullptr;`