Disabled "insert above" and "insert below" buttons (no active cell)

[jtpio]

Description

In some situations the buttons to insert code snippets as new cells in a notebook seem to be disabled while they shouldn't.

Reproduce

Create a new notebook and click on the cut icon in the toolbar several times.

With jupyterlab-chat:

jupyter-chat-no-active-cell-issue.mov

With an extension using buildChatSidebar from @jupyter/chat:

jupyter-chat-code-buttons-issue.mov

Expected behavior

The buttons should always be enabled when there is a notebook with the focus.

[jtpio]

To be investigated, but maybe it could also be an upstream issue related to jupyterlab/jupyterlab#15629.