Update ajax.tasks.php and ajax.tickets.php

Note: Since I'm not sure if that's all (replacing %s %s with %1$s %2$s) which is necessary to make this work, I'm sorry in advance for a potential "bad commit".

As already written on Crowdin, in German the order is wrong, so my suggestion is to make it possible to change the order by transforming "%s %s" to "%1$s and %2$s".
Format in English: Successfully assigned 4 selected tasks
Needed German: Successfully 4 selected tasks assigned

include/ajax.tasks.php

@@ -422,7 +422,7 @@ class TasksAjaxAPI extends AjaxController {
 
             // Assume success
             if ($i==$count) {
-                $msg = sprintf(__('Successfully %s %s.'),
+                $msg = sprintf(__('Successfully %1$s %2$s.' /* Tokens are <actioned> <x selected task(s)> */),
                         $actions[$action]['verbed'],
                         sprintf('%1$d %2$s',
                             $count,

include/ajax.tickets.php

@@ -764,7 +764,7 @@ class TicketsAjaxAPI extends AjaxController {
 
             // Assume success
             if ($i==$count) {
-                $msg = sprintf(__('Successfully %s %s.'),
+                $msg = sprintf(__('Successfully %1$s %2$s.' /* Tokens are <actioned> <x selected ticket(s)> */ ),
                         $actions[$action]['verbed'],
                         sprintf('%1$d %2$s',
                             $count,