UI: Improve Movie Clip Display Aspect Ratio

- Disable animation support (consistent with image editor)
- Use property split layout

scripts/startup/bl_ui/space_clip.py

@@ -71,7 +71,10 @@ class CLIP_PT_clip_display(Panel):
         clip = sc.clip
         if clip:
             col = layout.column()
-            col.prop(clip, "display_aspect", text="Display Aspect Ratio")
+            col.use_property_split = True
+            col.use_property_decorate = False
+            col.separator()
+            col.prop(clip, "display_aspect", text="Aspect Ratio")
 
 
 class CLIP_HT_header(Header):

source/blender/makesrna/intern/rna_movieclip.cc

@@ -355,6 +355,7 @@ static void rna_def_movieclip(BlenderRNA *brna)
   RNA_def_property_array(prop, 2);
   RNA_def_property_range(prop, 0.1f, FLT_MAX);
   RNA_def_property_ui_range(prop, 0.1f, 5000.0f, 1, 2);
+  RNA_def_property_clear_flag(prop, PROP_ANIMATABLE);
   RNA_def_property_ui_text(
       prop, "Display Aspect", "Display Aspect for this clip, does not affect rendering");
   RNA_def_property_update(prop, NC_MOVIECLIP | ND_DISPLAY, nullptr);