Openapoc: Buy/Sell/Transfer with mousewheel should be OPTIONAL and smoothed to user set preference

[makus82]

In buy sell screen item amount scroll is movable by mouse wheel
and when man start scroll he can buy or sell discreetly 2-4-5 different things from the list

when you mouseover scrollbar its shouldnt be scrolling by wheel where pointer at image

[makus82]

new player will not like that for sure)

[EmperorLol]

I don't know why I didn't report this a while ago but I at least want to echo that it is extremely annoying even to a not-new player

[FilmBoy84]

IIRC the current reason for this is a workaround due to another issue

At present, clicking the slider and scrolling it right/left with the LMB pressed does not move things in even, smooth, fractions of the total amount of an item available to buy/sell/move

Until that issue is resolved, it was decided to allow scrollwheel movement of the items as a stop-gap measure as whilst it is still no perfect, it's more accurate than the traditional LMB and slide mechanism that is jumpy and innacurate at best

OpenApoc should probably do the following:

1) Fix the LMB sliding issue
2) Allow Mouse-Wheel Scrolling as an OPTIONAL QoL feature for those who like it
3) Ensure that as well as being optional, the scroll wheel mechanism runs smoothly in increments set by the user preference (for example, OpenXCOM allows you to attribute a fixed value)

Have updated the title of this issue so we can combine this all into one report of related problems