This reverts commit 87cd6e1e.

entry "Admin tools", so now things are clear: All features restricted to
an admin user is inside "setup" (for setup) or "admin tools" (for action
tools) instead of 3 different entries.

Dolibarr uses HTML 4.01 or HTML5 doctypes.
The input form disabled attribute should not have a value.

Dolibarr uses HTML 4.01 or HTML5 doctypes.
The input form checked attribute should not have a value.

New tcpdf barcode label printing class and add parameters to printsheet
for using this class.
Add parameter to modules_xxx.php functions to pass printing templete
class to use

everywhere.

http://php.net/manual/en/language.basic-syntax.phptags.php

products. 

Normalize code for barcode module.