UI: make light spot shape panel consistent between Cycles and Eevee

Differential Revision: https://developer.blender.org/D9906

intern/cycles/blender/addon/ui.py

@@ -1443,6 +1443,7 @@ class CYCLES_LIGHT_PT_nodes(CyclesButtonsPanel, Panel):
 
 class CYCLES_LIGHT_PT_spot(CyclesButtonsPanel, Panel):
     bl_label = "Spot Shape"
+    bl_parent_id = "CYCLES_LIGHT_PT_light"
     bl_context = "data"
 
     @classmethod
@@ -1454,7 +1455,6 @@ class CYCLES_LIGHT_PT_spot(CyclesButtonsPanel, Panel):
         layout = self.layout
         light = context.light
         layout.use_property_split = True
-        layout.use_property_decorate = False
 
         col = layout.column()
         col.prop(light, "spot_size", text="Size")