Displays elements in a horizontal or vertical list. A scrollbar is automatically shown if necessary.
DPanelList was succeeded in version 13 by more specialised layout elements.
Derives from DPanel.
DPanelList:AddItem( Panel pnl, string state = "nil" )
Adds a existing panel to the end of DPanelList.
Removes all items.
Enables/creates the vertical scroll bar so that the panel list can be scrolled through.
Returns offset of list items from the panel borders set by DPanelList:SetPadding