significant palette overhaul, w. addition of +3 new palettes; new swatch preview appearance; expanded palette toggle functionality; repaired test suite accordingly

src/apps/dashboard/tests/integrated/test_views.py

@@ -303,7 +303,8 @@ class SetPaletteTest(TestCase):
         response = self.client.get(self.url)
         parsed = lxml.html.fromstring(response.content)
         forms = parsed.cssselect('form[action="/dashboard/set_palette"]')
-        self.assertEqual(len(forms), 1)
+        unlocked = [p for p in response.context["palettes"] if not p["locked"]]
+        self.assertEqual(len(forms), len(unlocked))
 
     def test_active_palette_swatch_has_active_class(self):
         response = self.client.get(self.url)