rna api - replace panel properties bl_default_closed and bl_show_header with bl_options which has 2 flags: 'DEFAULT_CLOSED' and 'HIDE_HEADER'.

this matches operators which also uses bl_options like this

release/scripts/ui/properties_data_lamp.py

@@ -42,7 +42,7 @@ class DataButtonsPanel():
 
 class DATA_PT_context_lamp(DataButtonsPanel, bpy.types.Panel):
     bl_label = ""
-    bl_show_header = False
+    bl_options = {'HIDE_HEADER'}
     COMPAT_ENGINES = {'BLENDER_RENDER', 'BLENDER_GAME'}
 
     def draw(self, context):
@@ -367,7 +367,7 @@ class DATA_PT_spot(DataButtonsPanel, bpy.types.Panel):
 
 class DATA_PT_falloff_curve(DataButtonsPanel, bpy.types.Panel):
     bl_label = "Falloff Curve"
-    bl_default_closed = True
+    bl_options = {'DEFAULT_CLOSED'}
     COMPAT_ENGINES = {'BLENDER_RENDER', 'BLENDER_GAME'}
 
     @classmethod