Adescos and juntas de agua tables chbs dependant

Now the adescos and juntas de agua tables have a
dependence onto their respective checkboxes for
being enabled.
NavTableForms updated to its latest version.

Now we use the session specific methods so it
can support other DBMS than Postgres.
Removed some translations.

After the refactoring they should be in navtableforms.
Updated fonsagua to latest multi-db navtableforms.

Now we can use fonsagua with any DBMS supported
by DBSession and NavTableForms (which in theory
now should work with any which is supported by
DBSession). The Croquis related operations are
the exception, but we have added a specific DAO
for the other DBMS supported by DBSession, sqlite.