This allows entering tab which is not normally possible within browser
(issue #115).

This allows us to override broken encoding detection for Java
properties in translate toolkit.

This causes not needed reordering of translated files (issue #112).

The counting needs to include only units we store in database and
is always expected to start from 1. This "automatically" worked
for po files, where first unit is always not translatable (header) and
thus was skipped.

Fixes issue #111