Made so active tab shows same colour as focus

Its a bit of a hack.
What we really need to do is:
1. remove .nav-sidebar .active {...} from site_styles.css.
2. find the correct keyword (not active) and actually apply that class
in the ajax_user_tab_page.js $(document).ready and $(main...).click
methods.  Still apply the active class as well. (remember to remove the
new class like active class is removed).