Leak in cockpit-0.77

[Stef Walter]

There's a leak in cockpit-0.77 where browser resources spiral out of
control after a while, and cockpit-bridge starts using up crazy amounts
of CPU.

https://github.com/cockpit-project/cockpit/issues/2821

This should be fixed in 0.78. The work-around is to install cockpit-pcp
on your system.

Cheers,

Stef