Jupyterlab-requirements extension button is overriding the submit-notebook button in the UI

Describe the issue The submit-notebook button is missing after installing the jupyterlab-requirements extension.

To Reproduce Steps to reproduce the behavior:

1. install elyra …e.g. make clean install on master
2. run pip install jupyterlab-requirements
3. start elyra

Screenshots or log output Paste the log output here.

Expected behavior A clear and concise description of what you expected to happen. Both buttons visible and functional

Deployment information Describe what you’ve deployed and how:

• Elyra version: 2.1.0 dev
• Operating system: macos
• Installation source: source and pypi
• Deployment type: local

[karlaspuldaro]

The fix in the new release of jupyterlab-requirement solved the issue. We can open a followup lab issue to avoid similar problems with other plugins.

[karlaspuldaro]

I just tried to recreate this issue by adding another notebook button extension in the same position on the toolbar, this is the behaviour: Before installing jupyterlab-requirements, both buttons are visible when being added in the same position (10)

But only Submit Notebook button is gone after installing the requirements extension, independent of submit notebook button position in the toolbar (I tried them all at position 10, then moved submit notebook button to other positions without luck)

I’m not sure the position only is the problem, I can help investigate it in lab.