Some fixes for #3074 Hungarian translation
Gii model generator did not add correct db connection

if component id is different from 'db'
do not throw exception if db component is not set

without this the form does not allow choosing a different connection id
Merge pull request #3084 from pappfer/hungarian-translation-fix

Some fixes for #3074 Hungarian translation
Update UniqueValidator.php
Merge pull request #3085 from plusodinminus/patch-2

small typos changes