Rename stamp panel to metadata panel.

Rationale - this panel also enables metadata that get written on files.

Also moved draw_stamp property in the panel - to make it clearer it only
controls the drawing, not individual metadata.

release/scripts/startup/bl_ui/properties_render.py

@@ -334,28 +334,25 @@ class RENDER_PT_post_processing(RenderButtonsPanel, Panel):
 
 
 class RENDER_PT_stamp(RenderButtonsPanel, Panel):
-    bl_label = "Stamp"
+    bl_label = "Metadata"
     bl_options = {'DEFAULT_CLOSED'}
     COMPAT_ENGINES = {'BLENDER_RENDER'}
 
-    def draw_header(self, context):
-        rd = context.scene.render
-
-        self.layout.prop(rd, "use_stamp", text="")
-
     def draw(self, context):
         layout = self.layout
 
         rd = context.scene.render
 
-        layout.active = rd.use_stamp
+        layout.prop(rd, "use_stamp", text="Stamp Output")
+        col = layout.column()
+        col.active = rd.use_stamp
+        col.prop(rd, "stamp_font_size", text="Font Size")
 
-        layout.prop(rd, "stamp_font_size", text="Font Size")
-
-        row = layout.row()
+        row = col.row()
         row.column().prop(rd, "stamp_foreground", slider=True)
         row.column().prop(rd, "stamp_background", slider=True)
 
+        layout.label("Enabled Metadata")
         split = layout.split()
 
         col = split.column()