location: Unescape geo uri description

Use g_uri_unescape on the description for geo uri formats
such as:
	geo:0,0?q=lat,lon(description)

This will allow us to have space in the description by
using %20.

Example:
	geo:0,0?q=lat,lon(My%20Location)

The above will give a description of "My Location".

https://bugzilla.gnome.org/show_bug.cgi?id=737979