Technically this doesn't solve any memory leak, but AwesomeWM uses in
average less memory when changing the selected tab in quick succession.
This is because it has less "temporary" tables to track.
The current `awful.widget.layoutlist` is a fork of the so far uncommitted `naughty.widget.actionlist`. It was created because some of the support code for the new `naughty` implementation needed "easier to merge" usage examples. The `layoutlist` was chosen because it was both a low hanging fruit and genuinely useful.
Emmanuel Lepage-Vallee