Feedback: replace state on initial load when using pushHistory

[niemyjski]

I noticed that if you have defaults and then update the params (spa mode), then hit the back button defaults are lost completely. I'm not sure if enforceDefault is the correct behavior here as I have some parameters that are ok to be empty and others that have to have a default for bind statements...

[niemyjski]

I also think there is an issue here where state is preventing proper navigation to previous pages (between pages when both pages use state). I'm going to work on a repl. I think it had to do with state not being in the query string and thus lost, but I need to narrow down the steps.