Removed not necessary thread and code cleanup.

app/assets/javascripts/app/controllers/import_zendesk.coffee

@@ -151,11 +151,7 @@ class Index extends App.ControllerContent
       success:     (data, status, xhr) =>
 
         if data.result is 'import_done'
-          delay = 0
+          window.location.reload()
-          if @Config.get('developer_mode') is true
-            delay = 5000
-
-          @delay(window.location.reload, delay)
           return
 
         if data.result is 'error'

lib/import/otrs.rb

@@ -440,11 +440,9 @@ module Import::OTRS
     }
     sleep 2
 
-    # start thread to import data
+    # start import data
     begin
-      import_thread = Thread.new {
+      Import::OTRS.start
-        Import::OTRS.start
-      }
     rescue => e
       status_update_thread.exit
       status_update_thread.join
@@ -457,7 +455,7 @@ module Import::OTRS
       Cache.write('import:state', result, expires_in: 10.hours)
       return false
     end
-    import_thread.join
+    sleep 16 # wait until new finished import state is on client
     status_update_thread.exit
     status_update_thread.join
 

lib/import/zendesk.rb

@@ -75,7 +75,7 @@ module Import::Zendesk
     }
     sleep 2
 
-    # start thread to import data
+    # start import data
     begin
       Import::Zendesk.start
     rescue => e
@@ -90,6 +90,7 @@ module Import::Zendesk
       Cache.write('import:state', result, expires_in: 10.hours)
       return false
     end
+    sleep 16 # wait until new finished import state is on client
     status_update_thread.exit
     status_update_thread.join