ui stule update

locale/catalog_export_en.properties

@@ -0,0 +1,2 @@
+# Catalog export tool — extra keys
+mods/catalog_select_mod = Select a mod:

locale/catalog_export_ru.properties

@@ -0,0 +1,2 @@
+# Catalog export tool — дополнительные ключи
+mods/catalog_select_mod = Выберите мод:

locale/ui_en.properties

@@ -86,6 +86,8 @@ tools/scenario_editor/unsaved_switch_text = You have unsaved changes. Switch fil
 tools/unsaved_title = Unsaved changes
 tools/unsaved_text = You have unsaved changes. Close without saving?
 
+mods/catalog_select_mod = Select a mod:
+
 tools/scenario_editor/play = ▶ Play
 tools/scenario_editor/play_tooltip = Run scenario in test mode
 tools/scenario_editor/stop = ⏹ Stop