Restart KOReader: add a ConfirmBox instead of a plain InfoMessage (#9853)

frontend/ui/network/manager.lua

@@ -501,9 +501,7 @@ function NetworkMgr:getPowersaveMenuTable()
         callback = function()
             G_reader_settings:flipNilOrFalse("auto_disable_wifi")
             -- NOTE: Well, not exactly, but the activity check wouldn't be (un)scheduled until the next Network(Dis)Connected event...
-            UIManager:show(InfoMessage:new{
-                text = _("This will take effect on next restart."),
-            })
+            UIManager:askForRestart()
         end,
     }
 end