Do not translate checkbox values

lms/templates/courseware/instructor_dashboard.html

@@ -157,7 +157,7 @@ function goto( mode)
     %if offline_grade_log:
       <p>
         <span class="copy-warning">Pre-computed grades ${offline_grade_log} available: Use?
-          <input type='checkbox' name='use_offline_grades' value="${_("yes")}">
+          <input type='checkbox' name='use_offline_grades' value="yes">
         </span>
       </p>
     %endif

lms/templates/instructor/instructor_dashboard_2/membership.html

@@ -32,7 +32,7 @@
   <textarea rows="6" cols="50" name="student-emails" placeholder="${_("Student Emails")}" spellcheck="false"></textarea>
   <br>
 
-  <input type="checkbox" name="auto-enroll" value="${_("Auto-Enroll")}" style="margin-top: 1em;">
+  <input type="checkbox" name="auto-enroll" value="Auto-Enroll" style="margin-top: 1em;">
   <label for="auto-enroll">${_("Auto Enroll")}</label>
   <div class="auto-enroll-hint">
     <p> ${_("If auto enroll is <em>checked</em>, students who have not yet registered for edX will be automatically enrolled.")}
@@ -41,7 +41,7 @@
   </div>
   
   <div>
-    <input type="checkbox" name="email-students" value="${_("Notify-students-by-email")}">
+    <input type="checkbox" name="email-students" value="Notify-students-by-email">
     <label for="email-students">${_("Notify students by email")}</label>
     <div class="email-students-hint">
       <p> ${_("If email students is <em>checked</em> students will receive an email notification.")}