Added strings for most_used IdPs

Reformatted array format

languages.php

@@ -42,7 +42,7 @@ $langStrings['en'] = array (
 'login_with' => 'Login with:',
 'other_federation' => 'From other federations',
 'logged_in' => 'You are already authenticated.',
-'favourites' => 'Most used Home Organisations',
+'most_used' => 'Most used Home Organisations',
 );
 
 
@@ -83,7 +83,7 @@ $langStrings['de'] = array (
 'login_with' => 'Anmelden über:',
 'other_federation' => 'Von anderen Föderationen',
 'logged_in' => 'Sie sind bereits angemeldet.',
-'favourites' => 'Meist genutzte Home Organisationen',
+'most_used' => 'Meist genutzte Home Organisationen',
 );
 
 
@@ -124,7 +124,7 @@ $langStrings['fr'] =  array (
 'login_with' => 'Se connecter avec:',
 'other_federation' => 'D\'autres féderations',
 'logged_in' => 'Vous êtes déjà authentifié.',
-'favourites' => 'Home Organisations plus utilisées',
+'most_used' => 'Home Organisations plus utilisées',
 );
 
 
@@ -165,7 +165,7 @@ $langStrings['it'] = array (
 'login_with' => 'Login con:',
 'other_federation' => 'Di altra federaziones',
 'logged_in' => 'Lei è già autenticato.',
-'favourites' => 'Home Organisations favorite',
+'most_used' => 'Home Organisations favorite',
 );
 
 // Portuguese
@@ -206,7 +206,7 @@ $langStrings['pt'] = array (
 'login_with' => 'Autenticar em:',
 'other_federation' => 'Outra FederaçAtilde;o',
 'logged_in' => 'Já se encontra autenticado',
-'favourites' => 'Instituição de Origem mais utilizada',
+'most_used' => 'Instituição de Origem mais utilizada',
 );
 
 ?>