AJAX searches should show the loading spinner

[batmoo]

If an AJAX search takes too long, it looks like something's broken. Add a loading spinner beside the search box while loading so users don't freak out.

Scribu batmoo et al, I would hold off on work on this until Jane posts the complete results of the user testing in the next few days. This will likely be closed as a duplicate of her ticket.

Ah, didn't know Jane was reviewing stuff already. Will hold off, for now :)

All ajaxified actions display a "Loading..." overlay accross the rows. Perhaps that should be made more proeminent, instead of the spinner.

Replying to scribu:

All ajaxified actions display a "Loading..." overlay accross the rows. Perhaps that should be made more proeminent, instead of the spinner.

Turns out that the overlay was broken so I didn't know it existed (hence the reason for this ticket)! A central loading indicator/overlay definitely makes way more sense.

It could use some more prominence (and a spinner inside it wouldn't hurt ;)) but I'll leave that for the UI folks :)

Fixes loading overlay (was missing a closing quote)

Closing as dupe. See #14579 and #15580

Commented there.