redesign(form/editor/etc.)

Huge redesign and cleaning of how edition is handled in the front.

• Created an alert service
• Hookified history and pending moderation
• Moved files around
• Form => form manager hold in a context
• Removed field mixins, make use of services
• Cleaned a bit module wrapper and module group wrapper
• A bit of perf optimization with memo

Fixes #168 (closed) #170 (closed)
WIP #126 (closed) #131 (closed)