Fixing several issues with keyingsets:

*Add a new idname to keyingsets, keeping name as label-only (using same string for both made lookup fail when using i18n other than english, as it tried to compare an untranslated static string id against a translated RNA name). Also adding a description string (can be helpful with custom keyingsets, imho).
*Fixed a few other bugs related to that area (namely, you can’t deselect current keyingset from the shift-ctrl-alt-I popup menu, and insert/delete key ops were using a rather strange way to get chosen custom keyingset…).
*Fixed UI code so that it always uses (RNA) enum, and simplified menu-creation code.

release/scripts/startup/bl_operators/anim.py

@@ -67,15 +67,16 @@ class ANIM_OT_keying_set_export(Operator):
         scene = context.scene
         ks = scene.keying_sets.active
 
-        f.write("# Keying Set: %s\n" % ks.name)
+        f.write("# Keying Set: %s\n" % ks.bl_idname)
 
         f.write("import bpy\n\n")
-        # XXX, why not current scene?
-        f.write("scene= bpy.data.scenes[0]\n\n")
+        f.write("scene = bpy.context.scene\n\n")
 
         # Add KeyingSet and set general settings
         f.write("# Keying Set Level declarations\n")
-        f.write("ks= scene.keying_sets.new(name=\"%s\")\n" % ks.name)
+        f.write("ks = scene.keying_sets.new(idname=\"%s\", name=\"%s\")\n"
+                "" % (ks.bl_idname, ks.bl_label))
+        f.write("ks.bl_description = \"%s\"\n" % ks.bl_description)
 
         if not ks.is_path_absolute:
             f.write("ks.is_path_absolute = False\n")