- Update for War of the Chosen compatibility.

- Sliders now properly respect step size and will clamp values to increments of step size. Setting step size to 0 will default to stepping 1/100 of the full range per increment/decrement.
- Sliders will display integer values now for most range settings.
- Some null reference issues fixed when optional event handlers are missing.

- Cosmetic fix: scrollbar is now positioned inside settings panel.

- Fixed issue where last elements on long settings pages would get cut off at the bottom.

Defensive code edit in code that generates Mod Options button to avoid storing instance of UIOptionsPCScreen. See for explanation: https://www.reddit.com/r/xcom2mods/comments/4sjj25/uiscreenlistener_pitfall_avoid_storing_uipanel/

Fixed these issues:

- Fixed issue where MCM sometimes prevents clean garbage collection of UIOptionsPCScreen when changing levels (loading screens). This may have cause graphical glitches. Fixed now. Details: https://github.com/andrewgu/ModConfigMenu/issues/35
- When opening MCM from the main menu, the foreground soldier is hidden. This addresses a problem where the grenadier's weapon sometimes obscures the "Save and Exit" button.
- Only Save and Exit button is now highlighted by default, instead of both the Cancel and Save and Exit buttons.
- Mouse scrolling now works when the mouse is over a Group heading.
- Escape key now quick-cancels out of MCM. Be careful: it will discard changes.

See:
https://github.com/andrewgu/ModConfigMenu/milestone/2?closed=1