revert a change that was preventing manuscript saving

This commit made a change to the handleSave function in Submit.js that makes it so that changes made in the full Wax editor in the manuscript page aren't saved. Reverting it makes it save correctly. Saving the manuscript doesn't have anything to do with the subject of that MR ("fix: show reviews when different ms versions"), so my best guess is that this is just zombie code coming back? @yashwit if you have any idea, that'd be helpful.