Fixed issue #2279 - performance issue in bulk action selection in overview (fixes #2279)

app/assets/javascripts/app/controllers/_application_controller_table.coffee

@@ -412,6 +412,12 @@ class App.ControllerTable extends App.Controller
         return if !@bindCheckbox
         return if !@bindCheckbox.events
         return if _.isEmpty(clicks)
+
+        # If a select_all callback exists, then trigger it once insteading of triggering the callback once for each checkbox
+        if @bindCheckbox.select_all
+          @bindCheckbox.select_all(clicks[0]..., e)
+          return
+
         for event, callback of @bindCheckbox.events
           if event == 'click' || event == 'change'
             for click in clicks
@@ -1007,4 +1013,4 @@ class App.ControllerTable extends App.Controller
     for position in [0..array1.length-1]
       if array1[position] isnt array2[position]
         return position
-    true
+    true

app/assets/javascripts/app/controllers/ticket_overview.coffee

@@ -1175,6 +1175,7 @@ class Table extends App.Controller
         bindCheckbox:
           events:
             'click': callbackCheckbox
+          select_all: callbackCheckbox
       )
 
     @renderPopovers()