Removed postion property from mapWrapper which was causing issues on small screens.

client/less/map.less

@@ -2,7 +2,7 @@
  * based off of https://github.com/gitterHQ/sidecar
  * license: MIT
  */
- 
+
 .map-aside {
     width:500px;
 
@@ -132,7 +132,6 @@
 }
 
 .mapWrapper {
-  position:absolute;
   display: block;
   height: 100%;
   width: 100%;