Rename dashboard to ‘current alerts’

The dashboard for normal services is quite general, because it tells
you a bit about channels, templates and spend.

What is now the dashboard for broadcast services is much more specific,
therefore less like a dashboard. We can reflect this by giving it a more
specific name. This should reduce the amount of navigation surfing
people need to do in order to find the thing they’re looking for.

tests/app/main/views/test_broadcast.py

@@ -143,8 +143,8 @@ def test_broadcast_pages_403_for_user_without_permission(
     (2, 'Continue', partial(url_for, '.broadcast_tour', step_index=3)),
     (3, 'Continue', partial(url_for, '.broadcast_tour', step_index=4)),
     (4, 'Continue', partial(url_for, '.broadcast_tour', step_index=5)),
-    (5, 'Continue to dashboard', partial(url_for, '.service_dashboard')),
-    (6, 'Continue to dashboard', partial(url_for, '.service_dashboard')),
+    (5, 'Continue', partial(url_for, '.service_dashboard')),
+    (6, 'Continue', partial(url_for, '.service_dashboard')),
 ))
 def test_broadcast_tour_pages_have_continue_link(
     client_request,

tests/app/test_navigation.py

@@ -188,7 +188,7 @@ def test_navigation_for_services_with_broadcast_permission(
     assert [
         a['href'] for a in page.select('.navigation a')
     ] == [
-        '/services/{}/broadcast-dashboard'.format(SERVICE_ONE_ID),
+        '/services/{}/current-alerts'.format(SERVICE_ONE_ID),
         '/services/{}/previous-alerts'.format(SERVICE_ONE_ID),
         '/services/{}/templates'.format(SERVICE_ONE_ID),
         '/services/{}/users'.format(SERVICE_ONE_ID),