Notebook: Escaping code completion pop-up disables cell edit mode

[dhuebner]

Bug Description:

When escaping the code completion pop-up the notebook cell loses focus, i.e. switches to non-edit mode

Steps to Reproduce:

1. Create a notebook an add print("Test")
2. In the next line press Ctrl+Space - a code completion widget should pop up.
3. Press ESC
4. Completion widget should close and the editor still be in edit mode. Means you can continue typing.

Additional Information

• Operating System: mac osx
• Theia Version: 1.54.0

[dhuebner]

Fixed here.