1.15 More fixes for Upgrades Panel disappearing bug.

[p]Apologies to anyone that was affected by upgrades/UI disappearing when scrolling the upgrade panel in chapter 2/4. [/p][p][/p][p]This patch has a few more fixes that should prevent the problem from occurring. If not, please let me know! [/p][p][/p][p]Cheers,[/p][p]Adam[/p]