reorganize the menu and make some more sections

Hello,

We need to continue reorganizing the left menu to make it easier to classify plugins

I propose we move those :

workflow section

• Public forms
• Registrations
• Invitations

I propose we create a new section, where we move 3 plugins.

security

• Sudo
• DSA
• Password policies

must be moved later :

• Aliases (linked to the new development for the University of Orleans)
• Applications, don't know exactly where to move it.