remove total grade tooltip when groups are weighted

fixes CNVS-10777

test plan:
- As teacher go to GB2
  - When assignment groups are weighted, total grade should not have a tooltip
  - When assignment groups are not weighted, tooltip should display normally
- As a student to to grade summary page
  - When assignment groups are weighted, total grade should not have a tooltip
  - When assignment groups are not weighted, tooltip should display normally

Change-Id: I80db6ddfff15116a2660e387fc517149cfc0f602
Reviewed-on: https://gerrit.instructure.com/29279
Reviewed-by: Matthew Irish <mirish@instructure.com>
Tested-by: Jenkins <jenkins@instructure.com>
QA-Review: Caleb Guanzon <cguanzon@instructure.com>
Product-Review: Mike Nomitch <mnomitch@instructure.com>

app/coffeescripts/gradebook2/Gradebook.coffee

@@ -498,7 +498,7 @@ define [
         templateOpts.warning = @totalGradeWarning
         templateOpts.lastColumn = true
         templateOpts.showPointsNotPercent = @displayPointTotals()
-
+        templateOpts.hideTooltip = @weightedGroups() and not @totalGradeWarning
       groupTotalCellTemplate templateOpts
 
     htmlContentFormatter: (row, col, val, columnDef, student) =>

app/views/jst/gradebook2/group_total_cell.handlebars

@@ -1,19 +1,21 @@
 <div class="gradebook-cell">
-  <div class="gradebook-tooltip {{#if lastColumn}}gradebook-tooltip-last{{/if}}">
-    {{#if warning}}
-      {{warning}}
-    {{else}}
-      {{#unless showPointsNotPercent}}
-        {{score}} / {{possible}}
+  {{#unless hideTooltip}}
+    <div class="gradebook-tooltip {{#if lastColumn}}gradebook-tooltip-last{{/if}}">
+      {{#if warning}}
+        {{warning}}
       {{else}}
-        {{#if possible}}
-          {{percentage}}%
+        {{#unless showPointsNotPercent}}
+          {{score}} / {{possible}}
         {{else}}
-          -
-        {{/if}}
-      {{/unless}}
-    {{/if}}
-  </div>
+          {{#if possible}}
+            {{percentage}}%
+          {{else}}
+            -
+          {{/if}}
+        {{/unless}}
+      {{/if}}
+    </div>
+  {{/unless}}
   <span class="percentage">
     {{#if warning}}
       <i class="icon-warning final-warning"></i>

public/javascripts/grade_summary.js

@@ -87,6 +87,9 @@ define([
     var $finalGradeRow = $(".student_assignment.final_grade");
     $finalGradeRow.find(".grade").text(finalGrade);
     $finalGradeRow.find(".score_teaser").text(teaserText);
+    if (groupWeightingScheme == "percent") {
+      $finalGradeRow.find(".score_teaser").hide()
+    }
 
     if(ENV.grading_scheme) {
       $(".final_letter_grade .grade").text(GradeCalculator.letter_grade(ENV.grading_scheme, scoreAsPercent));