Refactor dates_banner conditionals slightly

lms/templates/dates_banner.html

@@ -87,16 +87,18 @@ additional_styling_class = 'on-mobile' if is_mobile_app else 'has-button'
 </%def>
 
 % if not is_archived:
-    % if on_dates_tab and not missed_deadlines and getattr(course, 'self_paced', False):
+    % if on_dates_tab and not missed_deadlines:
+        %if getattr(course, 'self_paced', False):
         <div class="dates-banner">
             <div class="dates-banner-text">
                 <strong>${_("We've built a suggested schedule to help you stay on track.")}</strong>
                 ${_("But don't worry—it's flexible so you can learn at your own pace. If you happen to fall behind on our suggested dates, you'll be able to adjust them to keep yourself on track.")}
             </div>
         </div>
-    % endif
-    % if on_dates_tab and content_type_gating_enabled and not missed_deadlines:
-        ${upgrade_to_complete_graded_banner()}
+        % endif
+        % if content_type_gating_enabled:
+            ${upgrade_to_complete_graded_banner()}
+        % endif
     % elif missed_deadlines:
         % if missed_gated_content:
             ${upgrade_to_reset_banner()}