Use pretty_uri in results if available (smicallef#1582)

Per WhatsMyName docs:

"pretty_uri" : "if the check_uri is for an API, this OPTIONAL element can show a human-readable page",

so return this instead of the raw API results if is available.

modules/sfp_accounts.py

@@ -106,7 +106,11 @@ def checkSite(self, name, site):
             return
 
         url = site['check_uri'].format(account=name)
-        retname = f"{site['name']} (Category: {site['category']})\n<SFURL>{url}</SFURL>"
+        if 'pretty_uri' in site:
+            ret_url = site['pretty_uri'].format(account=name)
+        else:
+            ret_url = url
+        retname = f"{site['name']} (Category: {site['category']})\n<SFURL>{ret_url}</SFURL>"
 
         res = self.sf.fetchUrl(
             url,