The new API function is now renamed to pipeworks.tube_inject_item(),
so use it under that name. If it is not available, synthesise the new
API in terms of the old one.
Make the injector's mode button lag-resistant. Display the mode on
the button, as is done with other machines' toggle buttons. Describe
the modes using the same words that are now used to distinguish the
corresponding pipeworks objects. Expand name to "self-contained
injector", now that the pipeworks objects are also called "injector".
Show injector item image along with the item name at the head of the form.
The injector was in no groups, and therefore not breakable by ordinary
means. This was because the code referred to a defined variable that
went away in the course of a rewrite of the chests code.
