Add param for slider setting to only be whole numbers

[PabstMirror]

Setting _trailingDecimals to be less than 0 will only allow whole numbers to be allowed.

E.G.

["Test_Setting_3", "SLIDER",   ["-test slider-",   "-tooltip-"], "My Category", [0, 10, 5, -1]] call cba_settings_fnc_init;

Useful for settings where the value needs to be an integer.
Like a max number of objects or a for "_i" from 0 to Test_Setting_3 {

[jonpas]

How is that different from setting it to 0?

[PabstMirror]

With 0, the edit text will only say whole numbers, but the actual setting value will be a float.
So setting the slider about halfway between 0 and 10 and it would be 5.15010334

[jonpas]

Ah, but is that intended behaviour? IMO it would be better to change the value it saves to the same amount of decimals as is displayed.

[commy2]

Optional boolean parameter to make the value snap to however many decimals are set to be displayed?

[BaerMitUmlaut]

Changelog of 1.66 had something about a stepped slider, does that deprecate this PR?

[commy2]

No, this PR is still a thing. I'll merge it when I get back to https://github.com/commy2/CBA_A3/pull/4

[commy2]

merged in #606