REFEDIT session toolbar: definition name, working set count, REFSET

The right-edge toolbar of a REFEDIT session now shows the definition
being edited (REFEDITNAME) as an accent pill with the number of objects
in the working set, Add to / Remove from Working Set buttons with their
own icons (REFSET Add / Remove, straight to object selection), and
Save / Discard in a separate group below a rule.

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

locales/ru-RU/opencadstudio.ftl

@@ -6460,6 +6460,9 @@ view-background =
     .select-image = Select Background Image
 
 ref-edit =
+    .add-to-working-set = Add to Working Set
+    .remove-from-working-set = Remove from Working Set
+    .toolbar-objects = objects
     .select-reference = Выберите ссылку:
     .reference-not-found = Ссылка не найдена.
     .not-valid-reference = Объект не является допустимой ссылкой