use display instead of send_figure in inline backend hooks...
use display instead of send_figure in inline backend hooks
This lets custom display functions (e.g. HTML) be used without any extra changes (see
#2234).
possible downsides:
* The previous code guarantees that only one format is published. If multiple figure formatters are registered, display will send them all.
* If people for some reason disable the type-printers, then they will display the automatic figure display.
Neither of these cases can come up unless people are messing with the formatters, and I think the first is actually an improvement.
