'theme_switcher,' 'theme-picker' & 'theme' renamed everywhere to simply 'palette'; new urls & views & their corresponding ITs ensure applet menu checkbox functionality

src/core/context_processors.py

@@ -1,4 +1,4 @@
-def user_theme(request):
+def user_palette(request):
     if request.user.is_authenticated:
-        return {"user_theme": request.user.theme}
-    return {"user_theme": "theme-default"}
+        return {"user_palette": request.user.palette}
+    return {"user_palette": "palette-default"}