Panels: colored headers and fixed order

Every WTD panel gets a colored icon in its header (config PANEL_COLORS,
the Scene Manager sub-panels share its green) and the sidebar order is
set with bl_order: Tools, Rename, Scene Manager, Shot Manager, Sanity
Check.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

config.py

@@ -317,6 +317,16 @@ SCENE_MANAGER_ASSETIZE_TASK = "modeling"
 # --------------------------------------------------------------------------- #
 # UI
 # --------------------------------------------------------------------------- #
+# Colored icon in the header of each panel, to tell the tools apart (the Scene Manager
+# sub-panels use its color). COLLECTION_COLOR_01 to _08: red, orange, yellow, green,
+# blue, violet, pink, brown. Red is left out: it marks errors in the panels.
+PANEL_COLORS = {
+    "Tools": "COLLECTION_COLOR_05",
+    "Rename": "COLLECTION_COLOR_03",
+    "Scene Manager": "COLLECTION_COLOR_04",
+    "Shot Manager": "COLLECTION_COLOR_06",
+    "Sanity Check": "COLLECTION_COLOR_02",
+}
 CATEGORY_ORDER = [
     "Scene",
     "File",