[Qual] Uniformize code

Updated libraries

db->close must be do after llx_footer

Fix date handling for hours/mins in some pages

Fix uniqueness of objects reference

Fix decimals in payments of supplier invoices

Update const.php

addLogCP and updateSoledCP methodes throwing warnings when assigning leave for a user

[Qual] Uniformize code

remove around 50 duplicates.

link to help file