Fixes #3461 - Dashboard stats widgets are sometimes lost/empty

app/assets/javascripts/app/controllers/_dashboard/stats.coffee

@@ -19,8 +19,17 @@ class App.DashboardStats extends App.Controller
       for widget in widgets
         if @permissionCheck(widget.permission)
           try
+
+            el = @el.find(".column.#{widget.className}")
+            localEl = $("<div class=\"column #{widget.className}\"></div>")
+
+            if !el.get(0)
+              @el.append(localEl)
+            else
+              el.replaceWith(localEl)
+
             new widget.controller(
-              parentEl: @el
+              el: localEl
               className: widget.className
             )
             @$('.js-stat-help').tooltip()

app/assets/javascripts/app/controllers/_dashboard/stats/_base.coffee

@@ -1,12 +1,6 @@
 class App.ControllerDashboardStatsBase extends App.Controller
-  constructor: (params) ->
-    if params.parentEl
-      el = params.parentEl.find(".column.#{params.className}")
-      if !el.get(0)
-        el = $("<div class=\"column #{params.className}\"></div>")
-        params.parentEl.append(el)
-      params.el = el
-    super(params)
+  constructor: ->
+    super
     @load()
 
   load: =>

app/assets/javascripts/app/views/dashboard/stats/ticket_channel_distribution.jst.eco

@@ -1,4 +1,3 @@
-<div class="column ticket_channel_distribution">
 <div class="stat-widget vertical">
   <div class="stat-title">
     <%- @T('Channel Distribution') %>
@@ -22,4 +21,3 @@
     <% end %>
   </div>
 </div>
-</div>

app/assets/javascripts/app/views/dashboard/stats/ticket_escalation.jst.eco

@@ -1,4 +1,3 @@
-<div class="column ticket_escalation">
 <div class="stat-widget vertical">
   <div class="stat-title">
     <%- @T('Mood') %>
@@ -12,4 +11,3 @@
   <div class="stat-label"><%- @T('%s of my tickets escalated.', @StatsTicketEscalation.own) %></div>
   <div class="stat-detail"><%- @T('Total: %s', @StatsTicketEscalation.total) %></div>
 </div>
-</div>

app/assets/javascripts/app/views/dashboard/stats/ticket_in_process.jst.eco

@@ -1,4 +1,3 @@
-<div class="column ticket_in_process">
 <div class="stat-widget vertical">
   <div class="stat-title">
     <%- @T('Your tickets in process') %>
@@ -12,4 +11,3 @@
   <div class="stat-label" title="<%- @T('%s of your tickets are currently in process.', @StatsTicketInProcess.in_process) %>"><%- @T('%s% are currently in process', @StatsTicketInProcess.percent) %></div>
   <div class="stat-detail"><%- @T('Average: %s%', @StatsTicketInProcess.average_per_agent) %></div>
 </div>
-</div>

app/assets/javascripts/app/views/dashboard/stats/ticket_load_measure.jst.eco

@@ -1,4 +1,3 @@
-<div class="column ticket_load_measure">
 <div class="stat-widget vertical">
   <div class="stat-title">
     <%- @T('Assigned') %>
@@ -19,4 +18,3 @@
   <div class="stat-label"><%- @T('Tickets assigned to me: %s of %s', @StatsTicketLoadMeasure.own, @StatsTicketLoadMeasure.total) %></div>
   <div class="stat-detail"><%- @T('Average: %s', @StatsTicketLoadMeasure.average_per_agent) %></div>
 </div>
-</div>

app/assets/javascripts/app/views/dashboard/stats/ticket_reopen.jst.eco

@@ -1,4 +1,3 @@
-<div class="column ticket_reopen">
 <div class="stat-widget vertical">
   <div class="stat-title">
     <%- @T('Reopening rate') %>
@@ -12,4 +11,3 @@
   <div class="stat-label"><%- @T('%s% have been reopened', @StatsTicketReopen.percent) %></div>
   <div class="stat-detail"><%- @T('Average: %s%', @StatsTicketReopen.average_per_agent) %></div>
 </div>
-</div>

app/assets/javascripts/app/views/dashboard/stats/ticket_waiting_time.jst.eco

@@ -1,4 +1,3 @@
-<div class="column ticket_waiting_time">
 <div class="time stat-widget vertical">
   <div class="stat-title">
     <%- @T('∅ Waiting time today') %>
@@ -16,4 +15,3 @@
   <div class="stat-label"><%- @T('My handling time: %s minutes', @StatsTicketWaitingTime.handling_time) %></div>
   <div class="stat-detail"><%- @T('Average: %s minutes', @StatsTicketWaitingTime.average_per_agent) %></div>
 </div>
-</div>