deface :insert_after should be :insert_bottom for admin tab

[JupiterJones]

This may be just for 0.70 (since that's the only Spree I've used) however, :insert_after places the "Import Products" tab outside the admin_tabs div, where it should have been added as a new tab inside that div.

I've changed it in my local copy of the source, but I'm new to github so don't know how to submit it back :)

[joshmcarthur]

Submitting is really easy on Github (you've probably heard it mentioned as a pull request :-)). I recommend you check out http://help.github.com/send-pull-requests/ for a quick rundown on how these work.

Basically, if you pop that change you've made into a new branch on your fork, push it back to your repository, and then on GitHub switch to that branch, and hit the 'Pull Request' button - I can then review the changes you've made, and if they are correct, pull them into the main repository.

[joshmcarthur]

P.S. - if you reference this issue in your commit - i.e. if your commit message is something like "Deface :insert_after should be :insert_bottom for admin tab - fixes issue #9", then it should show up here when you do the pull request and make it easier for everyone else to trace the issue