Martin Fischer 180d4d068b [refactor] refactor SwitchableSetting
The previous implementation used two hash sets and a list.
... that's not necessary ... a single hash map suffices.

And it's also less error prone ... because the previous data structure
allowed a setting to be enabled and disabled at the same time.
2022-01-06 18:56:02 +01:00
..
2022-01-05 18:46:00 +01:00