Imrovements on Archive project

I think there can be a few improvements on the archive project window:

• There should be an "Abort" button, to stop the process if it's already started, since it can be a lenghty process and we can realize after starting it that we did something wrong. Closing the window doesn't solve it since the process continues.
• All the options should lock and grey out once the process has started. It's confusing to still be able to change these option while the archiving is in progress, even more since the changes made after the process has started have no effect.