Attract: draw strip metadata as its own panel

The panel is a subpanel in Blender 2.80, and a top-level panel in 2.79.

blender_cloud/attract/__init__.py

@@ -63,6 +63,7 @@ from pillarsdk.projects import Project
 from pillarsdk import exceptions as sdk_exceptions
 
 from bpy.types import Operator, Panel, AddonPreferences
+import bl_ui.space_sequencer
 
 log = logging.getLogger(__name__)
 
@@ -946,7 +947,13 @@ class ATTRACT_OT_project_open_in_browser(Operator):
         return {'FINISHED'}
 
 
-def draw_strip_movie_meta(self, context):
+class ATTRACT_PT_strip_metadata(bl_ui.space_sequencer.SequencerButtonsPanel, Panel):
+    bl_label = "Metadata"
+    bl_parent_id = "SEQUENCER_PT_data"
+    bl_category = "Strip"
+    bl_options = {'DEFAULT_CLOSED'}
+
+    def draw(self, context):
         strip = active_strip(context)
         if not strip:
             return
@@ -1023,13 +1030,6 @@ def register():
         name="Status")
     bpy.types.Sequence.atc_order = bpy.props.IntProperty(name="Order")
 
-    try:
-        panel = bpy.types.SEQUENCER_PT_info_input
-    except AttributeError:
-        # Blender 2.79 and older:
-        panel = bpy.types.SEQUENCER_PT_edit
-    panel.append(draw_strip_movie_meta)
-
     for cls in _rna_classes:
         bpy.utils.register_class(cls)