Add "Show Details" link to Shiny Updates on main Plugins page

[dmchale]

I love the new Shiny Updates, but some users (myself included) may want to still see the "ugly" details behind them. While this is possible from the WordPress Updates screen at /wp-admin/update-core.php, we're missing the functionality on the main Plugins page.

Not only is it good information to have, it would be extremely helpful for troubleshooting problems when something goes wrong with an update since currently there is no feedback to look at when a failure occurs. (for example, troubleshooting tickets like #32110 when plugins are being made to update in rapid-fire succession)

Can we add a "Show Details" link on the main plugins page, similar to what is already being shown on the WordPress Updates page, so that we can expand the details there as well? Optionally, we could even enable it as soon as the Update link is clicked, so that it could be expanded during the "Updating..." phase. That wayan admin could see what step of the process the update is at. Presently, you just cross your fingers and hope that it's still doing something while you wait for the "Updated!" or "Update Failed" response.

[dd32]

Showing the individual update lines Downloading..., Installing.. Activating.. etc is impossible due to the way that ajax requests work on most servers, we can't stream those bits of data back and have them interpreted reliably.

I think this is mostly redundant now that any error conditions are also displayed - see #32473

[dmchale]

Agree at the redundancy at this point, thanks @dd32. As long as SOMETHING useful is coming back for feedback, it's a step in the right direction. Sort of wish that someone had realized that useful feedback would be a good idea in the *initial* rollout of shiny updates but... c'est la vie, I guess :)