Tweak default ID types processing order, step 01: Collections.

Move `OB_GR` processing just after scenes, and before objects.

This is much more sensible in general, and fixes glitches in auto-resync
process of library overrides in particular.

source/blender/makesdna/DNA_ID.h

@@ -787,7 +787,6 @@ enum {
   INDEX_ID_CA,
   INDEX_ID_TXT,
   INDEX_ID_SO,
-  INDEX_ID_GR,
   INDEX_ID_PC,
   INDEX_ID_BR,
   INDEX_ID_PA,
@@ -798,6 +797,7 @@ enum {
   INDEX_ID_SCR,
   INDEX_ID_OB,
   INDEX_ID_LS,
+  INDEX_ID_GR,
   INDEX_ID_SCE,
   INDEX_ID_WS,
   INDEX_ID_WM,