updating: check for the newer version after clicking the toast

[yuyoyuppe]

📝 Provide detailed reproduction steps (if any)

if we don't click 'update' button on the notification right away, and then another version is released in the mean time, we need to update to it, instead of using now outdated-one.

[Jay-o-Way]

It makes sense to get the latest version possible at the time of actual updating.

[yuyoyuppe]

Estimating as large, since toasts could be interacted with when PT isn't running, making the process a bit cumbersome.