Add save shortcut for text shader editor to prevent it propagated to scene

when hit ctrl s in the shader editor

editor/plugins/shader_editor_plugin.cpp

@@ -614,8 +614,8 @@ ShaderEditorPlugin::ShaderEditorPlugin() {
 	file_menu->get_popup()->add_separator();
 	file_menu->get_popup()->add_item(TTR("Load Shader File"), FILE_OPEN);
 	file_menu->get_popup()->add_item(TTR("Load Shader Include File"), FILE_OPEN_INCLUDE);
-	file_menu->get_popup()->add_item(TTR("Save File"), FILE_SAVE);
-	file_menu->get_popup()->add_item(TTR("Save File As"), FILE_SAVE_AS);
+	file_menu->get_popup()->add_shortcut(ED_SHORTCUT("shader_editor/save", TTR("Save File"), KeyModifierMask::CMD_OR_CTRL | Key::S), FILE_SAVE);
+	file_menu->get_popup()->add_shortcut(ED_SHORTCUT("shader_editor/save_as", TTR("Save File As"), KeyModifierMask::CMD_OR_CTRL | KeyModifierMask::SHIFT | Key::S), FILE_SAVE_AS);
 	file_menu->get_popup()->add_separator();
 	file_menu->get_popup()->add_item(TTR("Open File in Inspector"), FILE_INSPECT);
 	file_menu->get_popup()->add_separator();