1.1.6 hotfix

[p]Hello everyone![/p][p][/p][p]This hotfix mostly includes fixes for a few types of crashes:[/p]

• [p]Fixed an occasional crash related to AI unit thinking about using concealment (mostly affecting dark elves)[/p]
• [p]Fixed a crash that occurred when a friendly unit is released from mind control (that happened before loading a combat save) because the controller is killed.[/p]
• [p]Fixed a crash that occurred when completing the fortress assault mission after reloading a combat save inside it.[/p]
• [p]Fixed skill research duplication, which occurred when building a base on a region that granted access to a skill school that had already been researched.[/p]
• [p]Fixed the invulnerability globe condition always starting at max counter when reloading.[/p]