Corrected PHP7 warnings for several pages

Fix download delivery and donation document

FIX : forgotten parameter for right multicompany use

FIX : global $dateSelector isn't the good one, then date selector on …

Conflicts:
	htdocs/install/mysql/migration/repair.sql

Fix #5911 Added missing Slashes

fixed line where two slashes were missing, that caused an error when creating barcodes.

Fix Subprice was null in supplier proposal and line was not transfered to…

FIX : global $dateSelector isn't the good one, then date selector on objectline_create tpl was hidden

FIX #6679 User with restricted supplier invoice permissions can edit project, payment conditions, payment mode

FIX #6680 User with restricted supplier invoice permissions sees "reopen" button even if he has no permission to do it

FIX #6675 Restricted user with no agenda permissions can see a button to create appointment in thirdparty contact list

FIX #6673 Missing "nature" table header in thirdparty list

FIX #6671 Cannot remove thirdparty type with "#" in its name

FIX #6669 User with no permission to edit customer invoices can see a edit button in project entry

FIX #6613 Default subject for Supplier proposal emails is filled with a non-existing key

FIX #6623 User card shows "Return to list" link even if the user has no rights to list users

FIX: dont get empty "Incoterms : - " string if no incoterm

FIX: dont lose supplier ref if no supplier price in database

Corrected translation errors and little bug showing a non-available button to a restricted user