move Param constants as class constants (refs #3860)
new style management (refs #3860)
no need close session after modify param (refs #3894)
update style management (refs #3860)
add dcpCssCopyDirectory interface
new CSS:CUSTOMREF (refs #3324)
use new style design for MODERN (refs #3891)
adaptation style for main interfaces (refs #3891)
api setStyle if no name update current style (refs #3891)
Merge pull request #804 from Eric-Brison/3.2-A3860

3.2 a3860 new Style design (closes #3891, closes #3324, closes #3860)
Do not delete user's sessions on module's install/upgrade (refs #3894)