[FIX] web: BS4, restore database manager
[FIX] web: BS4, restore database manager

The database manager was broken with BS4, this commit restores it. The
old BS3 layout was not perfect either, so this commit redesigns the
forms with BS4 too.

ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo