Application toolbar enablement does not udapte

Bug Description:

The application's toolbar enablement state is not updated. The app shows disabled, but it's clickable and executes.

Steps to Reproduce:

1. Navigate to https://theia-cloud.io/
2. Verify Split Editor Right toolbar item is disabled
3. Open a file in a text editor
4. Verify Split Editor Right toolbar item is incorrectly disabled; it's expected to be enabled
5. Click on the toolbar item, the command executes, and the editor splits to the right

When I update the toolbar by adding an item to the left, the Split Editor Right toolbar item correctly updates.

The same problem applies to the navigation toolbar items. Theia shows them disabled, but they execute.

https://github.com/user-attachments/assets/497a797c-7311-4455-92ea-a25de6117ceb

https://github.com/user-attachments/assets/98d23316-758c-4fc9-ab69-5bf1ea9e16e1

Additional Information

• Operating System:
• Theia Version: Version 1.73.100