Fix: Some bugs on withdrawal rejects
Fix: Do not show busy if event not assigned to a user.
Merge remote-tracking branch 'origin/3.3' into 3.4

Conflicts:
	htdocs/langs/en_US/errors.lang
	htdocs/langs/fr_FR/errors.lang
Fix: Try to avoid warning
Fix: avoid error when multiple files uploaded
Fix: Label missing
Fix: Cancel not working
fix some language issue
fix personal value error
Fix: Remove not used constant
Fix: Security test
Merge pull request #951 from grandoc/3.4

fix some language issue
Merge branch '3.4' of git@github.com:Dolibarr/dolibarr.git into 3.4
Update doc
Fix: Parameter delay not used when set to 0
Merge remote-tracking branch 'origin/3.4' into develop

Conflicts:
	scripts/invoices/email_unpaid_invoices_to_customers.php
	scripts/invoices/email_unpaid_invoices_to_representatives.php