added tendenci icon on support link; started fixing responsive layout
Placed first-level dropdowns into their own subtemplates (for {% include %})
Style cleanup/fixes
Merge branch '1301_tendenci_admin_mega_menu' into bixly-testing

* 1301_tendenci_admin_mega_menu:
  Style cleanup/fixes
  Placed first-level dropdowns into their own subtemplates (for {% include %})
  added tendenci icon on support link; started fixing responsive layout

Conflicts:
	tendenci/core/base/static/css/admin_menu.css