Create new activity in DB after cache injection

[charlesBochet]

When the user changes anything into the activity editor, we want to create in DB from what we have in cache + modification.

All fields on activity drawer should trigger this.

TBD with @Bonapara : what do we have to modify to trigger creation ?

### Tasks
- [ ] Do not display empty state on task, note or file tab during first fetch.

[lucasbordeau]

@charlesBochet @Bonapara We settled for triggering creating on any modification.