Replace tabs nav with a select in responsive layout

[fabiocaccamo]

Hi,
I added it to an existing project where I have about 10 tabs, and when the admin become responsive, the tabs still work but the layout breaks on multi-lines.

Here there are 3 solutions:

• Display only icons in tabs (this can be done easily passing safe html to the tab label, but in my case there are too many tabs and it is not enough)
• Allow horinzontal scrolling for the tabs nav (not very intuitive to use)
• Replace tabs nav with a select (I think this is the best solution)

What do you think about it?

PS. thank you for this great lib, it's very easy to configure and it works very well. I choosed it as my favorite admin tabs library and I added html/css support to django-admin-interface