Change map pins so that they do not obscure worker icons

**Issue by [zxcvforz](https://github.com/zxcvforz)**
_Thursday Dec 01, 2016 at 12:19 GMT_
_Originally opened as https://github.com/CQUI-Org/cqui/issues/157_

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This is what it looks like:


Note how the map pins labeled "HS", "CH" and "EC" are almost completely covering up the empty citizen buttons that are supposed to be there; we can only just make out the outline of those citizen buttons, and only because we are actually looking for them.

And both the pins and citizen buttons scale with mouse zoom, so at all zoom levels the map pins will still cover the empty citizen buttons.

_Suggestion:_ offset the map pins downwards. The map pins are also covering up the yield icons in both normal world view and strategic view. Something needs to be done about them sooner or later anyway.

No file, test, or entry point is identified in the issue. Start by locating the CQUI map-pin, citizen-button, and yield-icon UI definitions, then compare their positions at different zoom levels in normal and strategic views. Done means the pins no longer obscure the buttons or yield icons at any zoom level.

Written by the indexing model from the issue text.