BUG: Adjust labor slider to max/min doesn't update the laborer count

[Agamemnus]

Setting the _slider_ to the max or min values doesn't change the laborer count automatically like it does for all other values.

[sakasiru]

You have to click "apply" after setting the slider or typing the number.

[Agamemnus]

You have to click "apply" after setting the slider or typing the number.

That's only the case for max and min, now.