"Toggle" commands sometimes behave counter-intuitively

[Ellpeck]

• It would be nice if the toggle commands were actually an "enable" and a "disable" so that it's clear to users whether they're currently active or not
• When disabling the "slice for cursor position" mode, the current slice stays active. This is useful when searching for a variable you want to slice for, finding it, and then wanting that slice to stay behind, but it seems counter-intuitive in most cases. Potentially the "disable" version of this option should be named something like "Stop following the cursor when slicing" so that it's clear that it's not meant to hide the active slice