RE Edit fails to load nested decals

[ypujante]

An entry like this in device_2D.lua

 {
   {
     offset = {100, 310},
     Knob4 = {
       offset = {10, 20},
       {path="Knob4_path", frames = 4},
       {
         offset = {-110, 105},
         label_for_Knob4 = {
           {path="label_for_Knob4_path"},
         },
       },
     }
   }
 }

ignores the named (nested) decal label_for_Knob4.

Note1: it seems that nested named decal is not documented (see documentation) so this is why I did not implement it.

Note2: I believe this kind of nesting was generated by the 3D->2D conversion tool and not hand crafted