sound: Simplify the .ui code
Port several rows to AdwActionRow and CcListRow. This simplifies Sound panel .ui code, as it won't be necessary to set margins, use GtkBoxes or use GtkLabels for a row title/secondary label.
Also, set some widgets as GtkWidgets in the C code to avoid casting unnecessarily.
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Partially solves #2317
Edited by Automeris naranja