round scores in student mastery gradebook

fixes CNVS-13601

test plan
- create some outcome results with fractional scores (live
 assessments are great for this)
- view them in the student mastery gradebook
- ensure that the scores are rounded to two decimal places
- click to view the alignment details
- ensure that scores on the alignment details dialog are rounded

Change-Id: Ie46dd732597619c44479cb9c7000c0debe0aa2c0
Reviewed-on: https://gerrit.instructure.com/36380
Reviewed-by: Braden Anderson <braden@instructure.com>
Tested-by: Jenkins <jenkins@instructure.com>
QA-Review: Trevor deHaan <tdehaan@instructure.com>
Product-Review: Joel Hough <joel@instructure.com>

app/coffeescripts/models/grade_summary/Outcome.coffee

@@ -21,6 +21,13 @@ define [
       else
         'undefined'
 
+    roundedScore: ->
+      score = @get('score')
+      if _.isNumber(score)
+        Math.round(score * 100.0) / 100.0
+      else
+        null
+
     scoreDefined: ->
       _.isNumber(@get('score'))
 
@@ -36,6 +43,7 @@ define [
     toJSON: ->
       _.extend super,
         status: @status()
+        roundedScore: @roundedScore()
         scoreDefined: @scoreDefined()
         percentProgress: @percentProgress()
         masteryPercent: @masteryPercent()

app/views/jst/grade_summary/alignment.handlebars

@@ -1,5 +1,5 @@
 <div class="title">{{name}}</div>
 <div class="outcome-bar-wrapper">
-	<div class="score"><strong>{{score}}</strong>/{{mastery_points}}</div>
+	<div class="score"><strong>{{roundedScore}}</strong>/{{mastery_points}}</div>
   {{view progress}}
 </div>

app/views/jst/grade_summary/outcome.handlebars

@@ -21,8 +21,8 @@
 </div>
 <div class="outcome-score outcome-bar-wrapper">
   {{view progress}}
-  <span class="score" aria-label="Score: {{score}} out of {{points_possible}} points with mastery at {{mastery_points}}">
-    <strong>{{#if scoreDefined}}{{score}}{{else}}-{{/if}}</strong>/{{mastery_points}}
+  <span class="score" aria-label="Score: {{roundedScore}} out of {{points_possible}} points with mastery at {{mastery_points}}">
+    <strong>{{#if scoreDefined}}{{roundedScore}}{{else}}-{{/if}}</strong>/{{mastery_points}}
   </span>
   <a href="#tab-outcomes/{{id}}">{{#t 'alignment_count'}}<strong>{{count}}</strong> Alignments{{/t}}</a>
 </div>

app/views/jst/grade_summary/outcome_detail.handlebars

@@ -3,7 +3,7 @@
     {{friendly_name}}
   </div>
   <div class="outcome-bar-wrapper">
-	  <div class="score"><strong>{{#if scoreDefined}}{{score}}{{else}}-{{/if}}</strong>/{{mastery_points}}</div>
+	  <div class="score"><strong>{{#if scoreDefined}}{{roundedScore}}{{else}}-{{/if}}</strong>/{{mastery_points}}</div>
 	  {{view progress}}
 	</div>
   <div class="description">{{{description}}}</div>