[✓][BUG][PL] Selection isn't saved when setting 'Skill Button' hotkey

[WillLem]

Copied over from this topic.

ah yes, if you want to assign a key to "Select Skill Button", you can select which number skill button to assign it to, but there's no way to then "confirm" that number.
Neither choosing "Save & Close" nor selecting a different key will actually save the selection you made, my workaround was to swap to a different effect on the same key and then going back to "Select Skill Button". That worked for me.

[WillLem]

Confirmed.

The event handler for the control was unlinked (a symptom of having ported this code over from SuperLemmix). All controls have now been double-checked and updated as necessary.

I've also refactored the list handling a bit so that only the currently-being-edited item updates (rather than the entire list!), making the UI a bit snappier.

Fixed in NLCEPlayer commit ebc4405.