#109615 patch by geodaniel and Tobias Maier : Functionality to add another...

#109615 patch by geodaniel and Tobias Maier : Functionality to add another location should be on edit page, #108654 partial patch by geodaniel : Use 'Location' or 'Locations' instead of 'Location(s)', #112025 patch by geodaniel : Max number of locations should default to 0