labelWidget label; interactive widgets also use it for ID generation. A ## suffix can distinguish IDs without displaying the suffix.
True when the item is activated this frame; this is an activation event, not a persistent selected state.
"bool selected" carry the selection state (read-only).
Selectable() is clicked is returns true so you can modify your selection state.
size.x==0.0: use remaining width, size.x>0.0: specify width.
size.y==0.0: use label height, size.y>0.0: specify height
A selectable highlights when hovered, and can display another color when selected.
Neighbors selectable extend their highlight bounds in order to leave no gap between them. This is so a series of selected Selectable appear contiguous.
Implied selected = false, flags = 0, size = { x: 0, y: 0 }
Display a selectable item.