[Theia electron] Diagram remains inactive after using the context menu

[tortmayr]

When interacting with the context menu the diagram becomes inactive. In the browser integration it becomes active again once
the context menu is closed. In Electron it remains inactive (as indicated by the greyed out resize handles). Switching to another view and back restores the focus.

electron-bug.mp4

Integration: Theia Electron
OS: Ubuntu 22.04
Node: 20.15