Comment 1 for bug 1318430

It would be good if we could change the ajax installer so that it shows an error if one of the ajax tasks errors out, rather than spinning forever because that's a very common complaint. Get it to compare ajax time elapsed to when the ajax request started + php max execution time and if time elapsed has got too big throw an error.

Maybe we could do a follow-up request where we get the error messages from the session and print those to the screen.