ui-sref-active not working for state based (url-less) navigation

[samccone]

So, some apps do not use urls and instead use state changes.

Thus this line is evaluating to false,

https://github.com/angular-ui/ui-router/blame/86eacac09ca5e9000bd3b9c7ba6e2cc95d883a3a/src/stateDirectives.js#L68

because of this
https://github.com/angular-ui/ui-router/blame/86eacac09ca5e9000bd3b9c7ba6e2cc95d883a3a/src/stateDirectives.js#L66

Essentially checking the states href to determine if state has changed is incorrect.