Stylable UI components should be documented.

[MaximAlien]

In scope of this ticket UI components, which are available publicly and marked with /// :nodoc: should be documented. Some examples include classes in Style.swift, WayNameView.swift, NextBannerView.swift etc.

[1ec5]

In the process, we should ensure that the various class members are named according to Swift/Cocoa naming conventions. Some of them might be a bit rough. Renaming these members generally shouldn’t break backwards compatibility, except that we have documented some of them being used as part of a Style subclass.