add reset attempts all button click handler, increase polling interval, add slick grid refresh

lms/static/coffee/src/instructor_dashboard/analytics.coffee

@@ -9,6 +9,8 @@ std_ajax_err = -> window.InstructorDashboard.util.std_ajax_err.apply this, argum
 # Analytics Section
 class Analytics
   constructor: (@$section) ->
+    @$section.data 'wrapper', @
+
     # gather elements
     @$display                = @$section.find '.distribution-display'
     @$display_text           = @$display.find '.distribution-display-text'
@@ -99,7 +101,6 @@ class Analytics
           console.warn("unable to show distribution #{feature_res.type}")
           @$display_text.text 'Unavailable Metric Display\n' + JSON.stringify(feature_res)
 
-
   # fetch distribution data from server.
   # `handler` can be either a callback for success
   # or a mapping e.g. {success: ->, error: ->, complete: ->}
@@ -116,6 +117,16 @@ class Analytics
 
     $.ajax settings
 
+  # slickgrid's layout collapses when rendered
+  # in an invisible div. use this method to reload
+  # the AuthList widget
+  refresh: ->
+    @on_selector_change()
+
+  # handler for when the section title is clicked.
+  onClickTitle: ->
+    @refresh()
+
 
 # export for use
 # create parent namespaces if they do not already exist.

lms/static/coffee/src/instructor_dashboard/student_admin.coffee

@@ -215,6 +215,19 @@ class StudentAdmin
         error: std_ajax_err => @$request_response_error_all.text "Error starting a task to reset attempts for all students on this problem."
 
     # start task to rescore problem for all students
+    @$btn_reset_attempts_all.click =>
+      send_data =
+        all_students: true
+        problem_to_reset: @$field_problem_select_all.val()
+
+      $.ajax
+        dataType: 'json'
+        url: @$btn_reset_attempts_all.data 'endpoint'
+        data: send_data
+        success: @clear_errors_then -> console.log 'started reset attempts task'
+        error: std_ajax_err => @$request_response_error_all.text "Error starting a task to reset attempts on this problem for all students."
+
+    # start task to rescore problem for all students
     @$btn_rescore_problem_all.click =>
       send_data =
         all_students: true
@@ -255,7 +268,8 @@ class StudentAdmin
   start_refresh_running_task_poll_loop: ->
     @reload_running_tasks_list()
     if @$section.hasClass 'active-section'
-      plantTimeout 5000, => @start_refresh_running_task_poll_loop()
+      # poll every 20 seconds
+      plantTimeout 20000, => @start_refresh_running_task_poll_loop()
 
   # wraps a function, but first clear the error displays
   clear_errors_then: (cb) ->