top menu: 'Repositories' is really also a 'Home' button

'Repositories' had a href="#" but it wasn't used - the sub menu is loaded and
shown when hovering.

The '/' front page is a more verbose view of repositories. It thus make sense
to let 'Repositories' point there.

rhodecode/templates/base/base.html

@@ -147,8 +147,8 b''
         %>
         <ul id="quick">
           <!-- repo switcher -->
-          <li>
-              <a class="menu_link" id="repo_switcher" title="${_('Switch repository')}" href="#">
+          <li ${is_current('home')}>
+              <a class="menu_link" id="repo_switcher" title="${_('Switch repository')}" href="${h.url('home')}">
               <span class="icon">
                   <img src="${h.url('/images/icons/database.png')}" alt="${_('Products')}" />
               </span>