fix redirects always going to the default store main URL

[psdevhh]

I'm running a multi store setup and have noticed, that whenever I use one of the magneto-debug utilities (like "Enable/disable template hints" etc.), I get redirected to the default store main URL, instead of the page in the store I'm currently on.

I haven't yet investigated, why _redirectReferer always redirects to the default store URL, but the changes in this commit fix that behaviour and make the redirects work as expected.

[coveralls]

Changes Unknown when pulling cd63652 on pschnell:master into * on madalinoprea:master*.

[madalinoprea]

Hi @PSchnell,

I'm not sure if your changeset is correct. My assumptions is that current implementation is doing the same thing. _redirectReferer is identifying referring url based on HTTP_REFERER, if found is going to set it on response like you're doing.

The only difference in your commit is that you're also sending response. Maybe this line is fixing your issue?