7.1 login greetings update
Fixes: U4-4553 7.1 Template drop down has values but is blank

patches the it on the clientside for now, longerterm solution is to have
templates being returned as prevalues, but will leave that to shannon as
there could be other things accidentally being poked doing that.
Merge branch '7.1.0' of https://github.com/umbraco/Umbraco-CMS into 7.1.0