Add word "Kernel" to all respective language files in stable3.1.

$wb['monitor_serverstate_kernel_txt'] = 'Kernel';

In relation with the earlier merged commits of !790 
 and !791.

Fixes Encoding to UTF-8 and Add Some New Strings

Merged all language files.

Translation folow Fixed: FS#822 -for Main tabs at top not applying translations. Now login page and main tabs translations works. regards till.