Update categ.php

Add update label feature
Update sendings.lang

Fixed autogenerated translation
Update banks.lang

Improved translation of menu item ("Bonifici e giroconti" instead of "Bonifici bancari"): it makes easier to understand that you can transfer money to another of your accounts
Merge pull request #915 from defrance69/patch-6

Update categ.php
Merge pull request #926 from aponzio/develop

Minor fixes to language files