Adds h4 to student mastery individual outcome

Fixes: CNVS-14010

Test plan:
1) create a course with a learner
2) Add an outcome group  and an outcome
2) Navigate to the grades for a student, then the learning mastery tab
3) Expand the outcome group and see that the individual outcome title
   is in an h4.

Change-Id: I506ed259eb3064bad69c69e8b7505105a9167e16
Reviewed-on: https://gerrit.instructure.com/37461
Reviewed-by: Jayce Higgins <jhiggins@instructure.com>
Tested-by: Jenkins <jenkins@instructure.com>
QA-Review: David Josse <david@instructure.com>
Product-Review: Matthew Wheeler <mwheeler@instructure.com>

Author: mcwqy9

app/stylesheets/grade_summary.sass

@@ -372,6 +372,12 @@ $outcome-border: 1px solid #BCC2CA
     .title
       font-weight: bold
 
+      h4
+        padding: 0
+        margin: 0
+        font-size: inherit
+        font-weight: bold
+
     .outcome-score
       float: right
       width: 165px

app/views/jst/grade_summary/outcome.handlebars

@@ -15,7 +15,7 @@
 </div>
 <div class="outcome-properties">
   <div class="title" data-tooltip title="{{#if hover_name}}{{hover_name}}: {{/if}}{{description}}">
-    {{friendly_name}}
+    <h4>{{friendly_name}}</h4>
   </div>
   <div class="description">{{{description}}}</div>
 </div>