This is an alternative to #14798.
The "Peers" tab of the "Debug" window improved to address comments #6209 (comment) (by @jonasschnelli) and #14798 (comment) (by @promag).
This allows to keep the peer selection while navigating to other places and effectively reverts e0597268116cf90d961abeba9d14aaad0ab682d2.
Screenshots with this PR:

