Request: add edits by Neroth

[Odysseus86]

This fork of your extension by Neroth introduces some useful improvements.
Still, your extension is more complete, since it displays also sunset and sunrise times.
Could you please integrate into your branch the most relevant additions made by Neroth (i.e. the support to multiple cities and the better settings panel), please? Thank you.

[Baltix]

Please, include Neroth improvements into your branch. Compared to your version, this fork has these improvements:

1. settings dialog in JavaScript, where location can be added simply by entering city/location name (no need to enter WOEID)
2. multiple locations
3. a symmetric style