Add option to disable Civ 5 style cityview

**Issue by [kpagcha](https://github.com/kpagcha)**
_Wednesday Nov 09, 2016 at 08:52 GMT_
_Originally opened as https://github.com/CQUI-Org/cqui/issues/60_

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I wonder if there is any way to disable the Civ 5 style cityview component, otherwise it might be a good idea to implement a toggle option. Why?:

- Not much room in the center is left for narrower resolutions, so I can barely see what my city is working and both side menu bars look too overwhelming.
- When autorotation jumps to a city with pending production, or when you click on a city right after performing an action, the production bar is not shown so you have to close and open the city menu again to display it, which is rather annoying.

No files, tests, or entry points are named. Start by locating the Civ 5 style cityview component and any existing UI or settings options, then determine how a toggle would control it; done means the component can be disabled through that option and the requested city-view behavior is covered.

Written by the indexing model from the issue text.