Language update

Added different level of language preference functionaloty which can be
set from the new option in top navigation bar
Lanaguage preference can be set as
* System language (Default for all users)
* Session based   (User who are not logged in and want to see they
system in language of their choice can set their preference in browser
session)
* User lever (for authenticated users who have updated their language
preference, system will change into their selected language when they
log into the system)

routes/web.php

@@ -776,4 +776,5 @@ Route::group(['middleware' => ['web']], function () {
         //     $breadcrumbs->parent('dashboard');
         //     $breadcrumbs->push(Lang::get('lang.tickets') . '  >  ' . Lang::get('lang.open'), route('open.ticket'));
         // });
+    Route::get('swtich-language/{id}', ['as' => 'switch-user-lang', 'uses' => 'Client\helpdesk\UnAuthController@changeUserLanguage']);
 });