[BUGFIX] Allow negative coordinates

The world is more than just the part east of the prime meridian and
north of the equator 😜

This allows deeplinks to have negative coordinates. Also fixes the
coordinate picker when selecting coordinates with negative values.

Signed-off-by: Felix Kaechele <felix@kaechele.ca>

lib/utils/router.js

@@ -85,7 +85,7 @@ define(['Navigo'], function (Navigo) {
     var router = new Navigo(null, true);
 
     router
-      .on(/^\/?#?\/([\w]{2})?\/?(map|graph)?\/?([a-f\d]{12})?([a-f\d\-]{25})?\/?(?:(\d+)\/([\d.]+)\/([\d.]+))?$/, customRoute)
+      .on(/^\/?#?\/([\w]{2})?\/?(map|graph)?\/?([a-f\d]{12})?([a-f\d\-]{25})?\/?(?:(\d+)\/(-?[\d.]+)\/(-?[\d.]+))?$/, customRoute)
       .on({
         '*': function () {
           router.fullUrl();