Stk-code: Give tooltips on graphics settings

[Schyrsivochter]

Description

Currently, the custom/advanced graphics settings have a name and nothing else. I’d like the graphics settings to be documented in the options screen, preferably using tooltips.

What I’d like is something like what Minecraft OptiFine does. For every graphics setting, it has an explanation what it does, what different options mean, and what the performance impact is, e.g. for anti-aliasing:

Configuration

STK release version: 0.10 beta 1

STK source: official tarball

System: Ubuntu 18.10 x86_64

Graphics card: Intel HD Graphics 620

CPU: Intel Core i5-7200U

[PoorPocketsMcNewHold]

Or, a most complicated, but surely even more welcome from my part, would be a setting page showing of directly how these effects would apply, with a couple of screenshots with the different settings proposed in order to showcase these differences better.

[qwertychouskie]

For a list covering the graphics options and their approximate performance costs: https://forum.freegamedev.net/viewtopic.php?f=17&t=14333&sid=adf5e01a565792a8cb3e698bb1c60f07#p93958

[7wells]

If this comes, I am happy to translate into German (if needed).

Would it be possible to have some kind of auto-setting? I.e. let the code run some tests to check which settings are optimal for the available hardware. I know that this might be too complicated and that some settings depend on the track (e.g. number of lights), but maybe it is possible.