Remove unnecessary preference keys from RPC context

The locale key is only used by the client to properly format in the locale.
And the '.rec_name' keys are used by preferences dialog.

Closes #13068

sao/src/session.js

@@ -112,6 +112,8 @@
             this.reset_context();
             var prm = Sao.rpc(args, this);
             return prm.then(context => {
+                context = Object.fromEntries(Object.entries(context).filter(
+                    ([k, v]) => (k != 'locale') && !k.endsWith('.rec_name')));
                 jQuery.extend(this.context, context);
                 this.store_context();
             });

tryton/tryton/common/common.py

@@ -1293,10 +1293,15 @@ def RPCExecute(*args, **kwargs):
 
 
 def RPCContextReload(callback=None):
+    def clean(context):
+        return {
+            k: v for k, v in context.items()
+            if k != 'locale' and not k.endswith('.rec_name')}
+
     def update(context):
         rpc.context_reset()
         try:
-            rpc.CONTEXT.update(context())
+            rpc.CONTEXT.update(clean(context()))
         except RPCException:
             pass
         if callback:
@@ -1306,7 +1311,7 @@ def RPCContextReload(callback=None):
         callback=update if callback else None)
     if not callback:
         rpc.context_reset()
-        rpc.CONTEXT.update(context)
+        rpc.CONTEXT.update(clean(context))
 
 
 class Tooltips(object):