Request: Better progress bar

[johnnyshankman]

Would be nice if after you upload the file you get a spinner that overlays the page so you don't touch anything, then once it moves over to outputting the debug from the server it does its best to show a little progress bar with a time estimate.

Thank you for this tool! Using it as we speak, working great so far.

[johnnyshankman]

Also question, once the server kicks off the conversion process can I close the tab with localhost:80? The DOM filling up with all the text slows down the browser a bit at some point.