Changed the server Gemfile, made ruby debugger and pry available in test env
Handle errors when updating interactives.

IM [#45693099]

Validate that an interactive's title is unique within a group and is not empty.
Validate that an interactive's path exists. Create a client side error
dialog to display interactive update errors.
Choose an interactive group when saving an interactive

IM [#45693055]
A user should be able to make copies of previously saved interactives.

IM [#45693489]
Disabled interactive save until after interactive has been updated

IM [#45694013]
Allow models that have images to served by web app

IM [#44394367]
Avoid trying to import interactives that are broken.

IM [#46684809]
Removed trailing whitespace from the last two commits