New game screen mod selection broken - my bad

[SomeTroglodyte]

Game Version

current master from source

Describe the bug

• Clicking another mod will clear the first checkbox even if no compatibility uniques forbid the combo
• Started game will not match visible checkboxes
• Clicking a mod repeatedly will go off-on-off-repeat after fixing the disableChangeEvents blunder

Operating System

Linux

Additional Information

There's one obvious blunder in #11387: deselectIncompatibleMods is meant to turn disableChangeEvents on then off when it's done, but the "off" is a typo
But... When updateSelection is called (it actually shouldn't in this case, but shouldn't hurt either) it seems the Set holding the selected mods is not the same instance that the checkboxes see... Still debugging.