#1818 Upgrade AngularJS from 1.5.11 to 1.8

#1818

The biggest breaking change between 1.5 and 1.8 was the default hashPrefix.
See https://github.com/angular/angular.js/blob/master/CHANGELOG.md#location-due-to-1

Our solution is to force crmApp to use the previous default. This ensures that existing modules
which rely on crmApp for routing (which is nearly all of them) will be unaffected.

New modules like Afform which use their own routing should use the new default recommended by Angular.