Persist branch explorer bookmarks between sessions
Yep, they are only marginally useful if they are gone the next time you open the client.
But they would become REALLY useful if you can continue the next day where you left off.
NOTE this is not about labels - bookmarks are great for temprarily (and locally!) tagging certain changesets in individual workspaces, while labels are global.
Göran Wallgren commented
Currently, all applied bookmarks are gone when restarting the Plastic GUI.