I have a custom list, and when using the default form I am able to
select Insert Image from computer from the ribbon menu when inside a
rich html text field.

When I customize the form in InfoPath, and publish it to the list,
this updated form no longer allows this operation. I am sure I'm
missing a setting somewhere, and it's right in front of me. I am not
exactly sure how to phrase my question, so google results are leading
me in so many directions. Any references would be much appreciated.