I often use <new> tabs in the editor for temporary testing code, and I tend to keep these open in case I want to redo or utilize the test code. The problem with this is that every time I do a 'Save all' I get pestered to save the temporary tab.
What I would like is if there was a 'Do not save' context menu option for <new> tabs that allowed you to prevented the various save prompts from appearing when using 'Save all' or when closing the editor.
There is probably no need to add a way to reverse the 'Do not save' in the case where you decide you want to save the code after all, as you can simply copy the code to another new tab and save that.