config::ui::CustomCells

The Custom cells that apps register, by setting id.

Detailed description

A `Custom` cell is the one place a live widget is legal in the settings table, for example the audio-device picker with its level meter. A schema may declare at most 32 of them, because Qt walks every open editor on each scroll (config-ui §CFGV-5d). The table lives on the GUI thread, like the views that read it.