Dynamically registered menus are ignored by the menu renderer

[msujew]

Bug Description:

Discussed in #13716.

Registering a menu with a delay prevents that menu from showing up in the main application menu.

The issue is that the main menu is only recreated during startup and when the menu bar visibility changes. It doesn't listen on any other events.

Steps to Reproduce:

1. Add a delay to the registerMenus method of any MenuContribution.
2. Notice that the newly registered menu doesn't appear correctly
3. Adjust the window.menuBarVisibility setting.
4. The newly registered menu is now visible.

Additional Information

• Operating System: Windows
• Theia Version: 1.49.0

[baoqing1124]

setTimeout(() => {
menus.registerSubmenu(subSubMenuPath, 'Sample sub menu', { order: '2' });
menus.registerMenuAction(subSubMenuPath, {
commandId: SampleCommand2.id,
order: '3'
});
const visibility = this.preferenceService.get('window.menuBarVisibility');
this.preferenceService.updateValue('window.menuBarVisibility', visibility === 'classic' ? 'visible' : 'classic')
}, 5000);

@msujew Thanks for your help, I changed window.menuBarVisibility like this and it worked for me